Juggernaut armor and Combat alloy shield is to OP, then again, I can't seem to stop using it

Ya, but you can still die using them if your not careful. Plus in the future the gear may be unlocked with a doctrine tree, unfortunatly that would harm its ability to play well with other mods.

I don't know if you're still accepting suggestions, but I'd suggest buffing the compound bow to have a faster projectile (more "bow-like") with a tad additional damage. As of now it doesn't really seem relevent, since it rarely results in a one-hit kill and that pretty much negates any chance of stealth.

How about a minigun? It would be EXTREMELY fast and eh strong, but bad accuracy

Mini gun can not be fired from the hip IRL, losing all realism for the game, but adding the FAMAS F1 and possibly the AK-200 might help.

Maybe a crossbow, STEN gun, M14, RPKS, Shovel, Flamethrower, MAT-49, Remington 700, Taurus Judge, IWI Tavor and H&K MP7?
(since is going way overboard, maybe throw in the katana or another sword)

A Fal, and AK-47 au, Pkp and maybe a M4A1 would be cool. And ALSO gernade launchers!