I got a idea for how to rework both stated things in the title that i feel would make everything vet has be on a similar level and make him a better standpoint for how to change everything to be STRONG A tier but not go so crazy as to make s*** S tier in a way that you get kicked from lobbies for NOT using them.
for starters, this idea will have the smoke grenade and the shredder nades switch positions. This is an effort to nerf the value of shredders by making them the furthers from survivalist aura and when paired with another change to voice of command later, will hopefully make shredders and kraks on even ground as kraks arent bad in the least but shredders right now from both a talent tree and in game persepective are just too strong. beyond this, smoke grenades will be changed a good bit starting with fixing them so any ranged enemies on the other side of smoke to you or your allies with no possible LOS they can find will now move to where they would normally go to shoot your and than stop there and wait for the smoke to clear to help make their movement far less finicky and random and any ranged enemies in the smoke will stop and hunker down waiting for the smoke to clear so they can shoot again. Next is that 3 new effects will occur with the first and simplest being that when your smoke interacts with fire, tox gas, tox fire, and pox corruption like the beast of nurgle and the phage tree spew, it will clear them with for every 3m of effect removed, it looses 3 seconds of its duration as it neutralizes the corruption and chokes out the flames with this leads into the next change that it heals all allies corruption that hasnt taken a wound state yet just like beacon of purity but at half of beacon of purities efficacy. Lastly, all elite, specialist, ogryn, and monstrosity enemies IN the smoke or touching it are highlighted.
with those changes, it already if you ask me fixes the issues with the blitz options A LOT with next, i feel that demolition stockpile and demolition team need to move to the left side tree with smoke nades, survivalist aura, and executioners stance while voice of command and infiltrate move places. this is to further nerf shredders just a bit and help make it so using them isnt as effective as previously while also moving voice of command to a more fitting spot where it benefits from the melee vet tree since you want to be in the thick of it with the team (note this is a nerf of voice of command, im not trying to buff it with this is just me pointing out that its not the end of the world since the abilites design still works well even in this position) with beyond that, voice of command should loose its gold toughness talent and have that be replaced by 10 seconds of 100% boosted toughness gain from all sources. gold toughness is already REALLY strong and needs the nerfs chorus of the faithful has that requires the zealot to loose the ability to take any actions and thus requiring good teamwork to make its use truly shine with infiltates 2 charge ability should be replaced with its own version of tactical awarness that reduces your abilites cooldown on specialist and elite kills by 6 seconds meaning with tactical awarness, you get a minus 12 seconds on ALL specialist and elite kills meaning just 3 reduces its cooldown by 36 seconds which if your in the middle of a gunner horde, aint hard to do.
all in all, i feel this makes smoke nades ACTUALLY useful and puts them right in line with not only the best aura but the best paired talents of demolition stockpile and demolition team while most of all making them actually do what they are supposed to while making using executioners stance with the highlighted auras on all ranged enemies, specialists, and elites on the other side of the smoke being the best synergy to further help make them good while also making kraks which ARE ACTUALLY REALLY GOOD but just limited by their talent tree position in relation to shredders with this change letting them be better than shredders more often than not because they are so much closer to survivalist and demolition stockpile and team while shredders get to be in line with the extra grenade talent and the field supply to make it so they can get nades back from ammo crates with maybe that could be moved to the right side of the talent tree to just help a bit more and make the nerfs to shredders less harsh.
edit: i realized i should also clerify some minor talent position changes starting with longshot and exhilerating takedown moving to close order drill and confirmed kills spot with next would be take a breath and get back in the fight replacing grenade tinkerer and covering fires positions respectively.
next would be kill zone and opening salvo replacing twinned blast and demolition stockpile while leave no one behind would replace field improvization.
the next change would be moving born leader and iron will to replace reciprocity and desperado and moving competetive urge to exploit weaknesses spot and vice versa. lastly you would move bring it down with superiority complex and move born leader to duck and dives position with the final change would be presicion strikes to take move to rending strikes spot and vice versa.
these changes would just make things a bit better suited to work well with eachtoher especially with the final major change i would suggest being marksmans focus to take the place of focus target as its the stealth infiltrator with semi auto weapons and all the time in the world to aim for heads while invisible and standing still and who would have a heavy crit and weakspot focus versus the executioners stance vet using likely auto guns that ACTUALLY DO need the bonus damage from executioners stance and who would likely be wanting to fire with reckless abandon into a crowd to covering fire their teammates or mark specific targets for EVEN MORE damage taken with most of all, its the commander with voice of command who would want to be in the middle of the fight close enough that VoC can actually hit all teammates and thus would want all the bonuses to melee and fast swapping back and forth to and from it.
edit 2: i just realized it would make more sense as i am running these ideas through my head to give close order drill to the right side of the vet tree since thats the MELEE side so why does the guy who gets close up in melee NOT have close order drill espeially when its a coherency boost to not just you but your TEAM so the VoC COMMANDER type vet should be the one to have it while the weapon swap speed honestly would do its best work on executionerstance vet and being boosted to like maybe even 50% faster swap speed so you can hot swap to melee to kill poxwalkers too close to you as you CAN swap while in executioners stance to melee and get some kills in it but you just need to stay ranged mostly to actually keep up the executioners stance but ESPECIALLY with my change to the highlighted for teammates talent to make it so that lets your teammate kills in cohrency on highlighted targets boost your executioners stance duration with maybe even buffing it a little more by giving it a damage boost to ALL teammates in coherency with you on those targets for HALF of the damage boost you get.