I've pugged with many acolyte users and it has never affected my gameplay in any way tbh.
Don't me wrong, entering a lobby containing acolyte users never fails to put a smile on my face... chiefly because it alleviates my obligation to bring one.
But I don't get why you feel the gun should be banned.
If the acolyte didn't exist, then carrying one on mission would not be an option, and hence I would spend the majority of my time using other weapons. But because the acolyte is so overwhelmingly superior at what it does, and because you can always bring one "for free", it simply does not make sense to not equip it on all but a few kits.
For example, the Krogan Soldier is by and far my favorite character in this game, which I routinely run on plat with the Graal/Claymore/Raider. However, if it's a pug with no other acolyte users, you better believe I'm going to bring one. Because when those double banshees show up (or any other boss for that matter), my acolyte is likely going to save the day. And due to the nature of platinum pugs, once I whip out the acolyte, is awful hard to put the ****ing thing down, because of its ridiculous effectiveness. As a result, the weapon I'd rather be using collects dust on my back for the majority of the match.
As Kushiel alluded, this may be more of a personal issue than an issue with the weapon. It might the case that I just need to take my happy @$$ to AA (Acolytes Anonymous) and get some ****ing help, lol.
Then again, this weapon turns even the most unlikely pugs into sub-30 successful extractions, so I really can't complain. It has certainly done wonderful things for my ego!