I think it’s more a matter of difficulty gaps, communication tools, and differences in player skill.
Difficulty Gaps
It’s been 1.5 years since I leveled my last character and a lot has changed, but at least back then Malice was just boringly easy. Yet going from T3 (Malice) → T4 (Heresy) the enemy hp & dmg increases by 50%, the spawns are way more aggressive and ofc. now there’s Auric modifiers like HISTG on top.
So the gap in difficulty between T3-T4 is way bigger than anything before or since. From T4 → T5 (Damnation) it’s just +33% iirc while the modifiers etc. stay the same. Back around release there was also the issue of penances requiring a minimum of T4, so a lot of people who were in no way ready for it were still there to grind those (idk how common those penances are now).
Communication Tools
While nice, they’re are far from ideal. Resource pings have a short range. Tagging resources is arduous & requires pixel perfect accuracy, so you’re likely to spam them in frustration while focusing on everything else … only to doubletap and cancel the whole thing. Enough of that and you just won’t even bother anymore.
On top of all that both chat & pings are super easy to miss during a fight, especially for new players already overwhelmed with everything else. Yet the game doesn’t communicate resources effectively like team ammo states (maybe it does now, not sure). Nvm even explaining how ammo boxes work, so ofc. newbies burn the whole thing in an instant and screw everyone over just triple clicking it every few shots. In their defense, it’s illogical for the thing to have a # of uses instead of # of ammo.
In short, the game doesn’t offer the experienced the tools to help the newbies stay informed, stocked on ammo, health etc. and it’s easy to miss refills when available.
Player Skill
Finally, Darktide is absolutely a skill-based game first. A great player can do with grays far more than a newbie / mid player can do with a full set of gear, and great players tend to learn fast. A fresh lvl 30 great player is easily ready for T4, likely even T5, where a level 300 fully geared middling gamer can barely handle T4. To restrict the former on T3 while sending the latter on to T5 Aurics is just going to make things worse for everyone involved.
tldr;
If the game needs anything, imo it’s to either give us a new difficulty somewhere between T3-4, or to reverse the relationship of T4-5 difficulties so that T4 is a smaller step up from T3, while T5 then would be an extreme step up from T4.
I’m not opposed to setting some kind of a filter for newer players but it would have to be based on something other than gear. Especially in the current RNG where not only is earning that gear up to RNG in the first place, but your gear score has precious little correlation between the real power of the build & blessings nvm. the player’s skill. So something like “must complete N tier X missions” before getting access to the next one would imo be the best bet.
But considering how many fully geared level 300+ players I see every day on T5+ who miss every single resource, don’t heal, walk straight into pox bursters, can’t handle hordes or dodge muties etc? Honestly, I think the best thing we could do is just get a proper set of tutorials and better communication tools to teach the basics even to those unwilling to learn. 