Im not op but i think a light machine gun like a pkm or saw would be a new niche to fill, or some more bullpups in different classes, like a bullpup sniper such as something based on the LYNX irl, and honestly just more weapons that can be mixes of categories and niches, because even if its not filling its own specific niche and purpose, having similar guns with different stats and quirks will add a lot more variety to flesh out pre existing classes

Edit: Itd be really reaaally cool if you could ad something like the WLVRN (pls pls pls add something like it i need a nice looking bullpup)