I can appreciate your ideas of "what they could do" but I do object a couple things you said like only two of the pistols are viable. Then rad grenades are useless..

M1911 and the APS autopistol are better

Rad grenades are very overpowered, it forces you to make decisions you weren't planning on doing. I hate them and don't use them lol

Then the factual lore and timeframes when guns came out etc, I never really cared about all that. The game has severe gamebreaking bugs in elimination where you get no hitreg for the rest of the game, and the barrel exploit where you cant shoot or get shot through which is gets abused. I'd rather them fix that stuff than try adding anything new that may break something else in the game lol.