I think that disabling specials (Poxhounds, Trappers and maybe Mutants) shouldnt be focusing their attacks on the player which is closest to the ennemy line. I main zealot, and have also played quite a lot the other classes. Disablers are somewhat meant to be the sneaky infiltration units that prey on backliners and stragglers, by “sneaking behind them” undetected. I makes no sense that those units are just mixed with the main regiment of troops, on the frontline. When you decide to take a risk and brave ennemy fire (stalkers, shooters, reapers etc) to go tie up some of the firing squads, already being focused on by a huge amount of firepower - I mean it’s literally one of the main purpose of the zealot class - you shouldnt be just instant canceled by a disabling unit spawning out of nowhere, on the frontline, in the “no man’s land”, disabling you where you teammates absolutely cannot reach you. I agree that the purpose of disabling unit are to increase team cohesion, to force you to do more teamwork. Taking risks for you team, using the strengths of the specialization you have chosen to move forward with the mission, and being instantly put out of the game by some disabling unit that have nothing to do here in the first place is one of the most frustrating experience I have faced in this game.
Edit: I’m also figuring that those are to punish people who try to speedrun maps, not waiting for their teammates and all, but there are “elevators” which kinda fulfill this goal already, forbidding progression if all 4 crewmates aren’t in the room