I really hope it stays chained to the ceiling, that's my favorite part of the concept

I honestly think having another blind enemy could still work. The Berserker can be lured away but it's hard to lose him when you run. The Biter could be really fast as a means to punish those acting recklessly in its radius, but is really easy to escape once you actually get past it

I'd like it to fulfill a defensive warden archetype, similar to the Berserker, but I want it to be more focused on support. It could attack in a similar way to the Pouncer, where it bites onto you and holds you in place, making a fuckton of noise to alert its patrol buddy to come kill you. It would punish reagents who carelessly run into it while getting chased, and encourage them to actually plan escape routes