Were it up to me smoke grenade would be replaced entirely with a blitz called sidearm.
Press the grenade button to take out a plasma pistol (upgraded to a bolt pistol with sub node?) That you can fire until your out of shots (grenades) before you put it away. Like any vet nade it can be regenerated or grt more in the usual perk ways. Maybe tinker gives it peirce?
You can easily pair this with any other ranged…recon. shotgun? Hell take a bolt pistol and a bolt gun for double the bolter double the fun…it opens up alot of possibilities to have a high powered sidearm as your “grenade”
In VT2 one of the ults was an ultimate on the class “Bounty Hunter”.
Basically, your character would whip out a huge pistol with very crispy and nice sound effect and blast a shot.
Shooting a fully armoured Chaos Warrior on point blank range in the head and seeing his huge posture slowly fall backwards with big “clunk!” was awesome.
I have the feeling the backpack and hotshot weapon if they do appear, will appear as a sub class. Much like bardins engineer class if you’ve ever seen that.
Your ultimate would be pulling out your heavy weapon to do damage, either with a limited recharging ammo pool, overheat or time restriction.
With that I can picture one of the power mutators will be turning it into a hot shot vollygun, the same thing scab gunners use on us. Giving us access to either single target devestation or horde clearing fun.