TL;DR: 100% agreed. Audio issues, LOS issues, and a (currently) fundamentally lazy design. The current issues absolutely need to be fixed and then ideally they should be re-worked to some extent to make them more nuanced and engaging to play against.
OP you are correct. They are the worst offenders at the moment when it comes to audio issues and railing/wall clipping. Trappers are fair to fight until they do something they shouldn’t be doing, which is quite often at the higher difficulty levels. Personally I’ve been quite comfortable doing Auric Hi5s/Maelstroms for quite some time now on my Zealot and typically, I’ve seen fewer run-ending issues with the other disablers but when trappers either show up silently in the middle of a mixed horde, or only the tail end of the net-gun sound cue plays giving the player 0.5s or less to react with no visual (if they even have the space to dodge at all), it’s absolutely infuriating and it takes that player out unfairly which in turn sucks the enjoyment out of the game.
That’s not to say that Mutants and Poxhounds’ audio isn’t borked (because it is too), but a big part of why trappers are so particularly irritating when they bug out is because they are indeed, just lazy game design. By comparison to other disablers/specialists, when a mutant or a poxhound’s audio messes up for example and catches a player off-guard, they still both give said player a window of opportunity to recover from getting caught out. Mutants will throw you away allowing for them to be taken out (and in some cases they actually help the player out by throwing them away from a bad situation), hounds will eventually get off you if you have enough health and time to spare, or a team mate can knock them off from a safe distance, etc. etc. Snipers can be an issue if low on health but unless there is minimal cover and it’s a Snipers modifier, there is also a window of opportunity to deal with them even after getting hit once or twice depending on one’s dmg resistance to them. Trappers however? It’s essentially a one-tap disable with no chance to recover yourself after the fact if the audio messes up or they shoot a magic net through everything. They do not offer nuanced enough gameplay compared to the other disablers and as such, they are far less forgiving when the combat director and audio messes up. And while we’re at it - on a lowly par with Trappers are the instant detonation, spawned right next to you Poxbursters that the combat director too often loooves to throw at teams on certain modifiers.
For the record, I do not want to see Trappers removed entirely. Their audio and clipping issues clearly need to be fixed ASAP (that much is obvious), but once all of that is working consistently, I would like to see FatShark revisit how they function. My preference for how they could work would be a brief, initial ‘stunned’ timer to keep the player trapped for X amount of time (it’s a disabler after all and if the game is playing fair then said player should be punished for making a mistake), followed then by either mash Y button or succeed at Z minigame much the same as with data interrogation (like your basic ‘get a rapidly moving marker to hit the indicated zone on a wheel or bar’) to break out. The harder the difficulty the faster the marker could move and for the sake of a challenge the player gets only one chance on Damnation (Heresy can be 2 attempts, Malice 3, and so on), otherwise it’s down to your allies to get you out, and they can free you at any given time, same as it is now. The timer would just exist for the trapped player as a prerequisite for any attempt to free themselves. That would be more engaging than what we have now and it would hand back over some initiative to the player while keeping the Trappers’ disabling mechanic in the game. 10 seconds timer would be about right in standard missions, perhaps 15 seconds in Auric. And whilst we’re at it, the cooldown between them firing nets needs to be increased in all circumstances by at least a few seconds, but especially if they get bonked over the head with a hammer or take an eviscerator to the gut.
Lastly, I also like the idea of them only being able to fire their nets through anything that has less hit mass than them. That seems fair enough to me. Over to you, FatShark.