Keeping it short, since we all know this isn’t something even remotely likely to be changed anytime soon, but the lack of proper sights for weapons that really need them is frustrating, and so are the weird choices involving fixed firing modes for weapons.
These design decisions seem to be aimed at making weapon grinding more of a thing (and therefore ties into the problems with that system), but ignoring that whole mess it’s just generally frustrating to be permanently locked into inappropriate fire modes and sights.