I think they just need to fix their spawns and pathing. Once that’s done, they should remain as they are. They’re not insurmountable; some classes (Slayer is great at this, actually) can scythe through them like they’re butter.
I think one reason people have such problems with them is that they panic and don’t know how to fight multiple armored enemies they can’t just whip out a sidearm and blast. Sure, Bounty Hunter can take out two quick (with Blessed Shot and his F), but then he’s out of luck. Fighting a group is more like fighting a group of Stormvermin from the first game. Unless you get cornered or make a big mistake, you’ll be fine.
First just clear out the chaff, then whittle down the warriors.