Haven’t used Chainswords in a while but they at least used to be a great option for hybrids. Mk XIIIg is fast, has a fantastic moveset for both cleaving and single-targets, and the special lets you really hurt armor & biggies in particular. It’s an all-in-one weapon doing everything you could ask for, but not really being great at any of it. Main problem ofc is the thing all chain weapons suffer from, what with the special forcing you to stand still in a meta where you’re always surrounded by a hundred mobs trying to get a hit in.
As for Helbores, I’m mostly with @Molonius there. It takes ages to swap, and also only drops 1 heavy at a time. Except the heavies come in packs and you’re always surrounded by a 100 of everything else while they do. AoE weapons will basically always have the upper hand in a game like this. But ofc it doesn’t help that the plasma is so overtuned: It swaps way faster, doesn’t need charging, doesn’t depend on long aim times and crits, and ofc cleaves and does AoE splash dmg on top.
As for the shotties… they’re in a weird place, but they kinda always have been. It’s just different now. Idk what I missed or how they shadow nerfed them back around Unlocked & Loaded, but it definitely set them back a lot.
Issue is back before they got nerfed they were ridiculously powerful, and in many builds just bonkers OP in skilled hands. But even then they were the unpopular choice for being arguably the most difficult ranged to build to and master. I mean jfc the entire meta around them was completely wrong for well over a year, bc the community had no idea how to use them (and bc the blessings to make them OP were T2-exclusive and super hard to get)! Even then we always had posts about shotties being bad, when really they were crazy strong.
Now since the nerf it’s even more problematic. Shotties are still definitely good - in highly specific builds and very skilled hands -, but far from OP. Which kinda means only shotty experts can even make them work on par with the other good weapons, with a way more effort than any of those others would take. But if you’re not an expert? Yeah, better not even touch em. I mean there are exceptions and some builds wouldn’t even be possible without shotties but ultimately that’s a novelty that doesn’t really matter in the endgame.
I do think they could use a buff, somewhere between where they were, and where they are now.
Edit: I think this whole topic just really shows the problem of how balance issues tend to spread & affect more than just one thing. For example if plasma & revolver weren’t so OP, there’d be a lot less pressure to keep increasing those spawns for adding difficulty. Which would have a double positive effect for making other weapons more viable.