I personally welcome any gun into this game. I'd like to see more diverse guns making it through the Bluehold Gateway.
I think we need to see more LMG's imo. The game lacks that sort of gun massively, I love LMG's in all games (COD, BF)
on the SMG front, I'd like it if they would make it so the Uzi could have a red/holo, it is downplayed so much because the Ironsights are just awful.
From what it seems most new guns (other than pistols) go straight into the lootbox to be able to balance them, not letting everyone in a single game get them and screw over everyone, which is really nice personally. Guns like the KAR98 need removing from the lootbox, I think this'll change very soon!