It's not even that. I personally don't care about OP weapons, they do their job.
Anything to survive.
What I worry about is control scheme. Can't iron sight on my controller with the left trigger, would have to map a new...wait that's one's being used...What button isn't being used? Maybe keyboard...? Well, that just kicks USB controller users in the crotch. Or do both fire with the right trigger?
It's just messy. the KISS rule is fine by not having it.