The reason why weapons aren't tweaked to be realistic is because most people don't suggest it.
The station design is bad, I agree, but how does station design apply to heavy RP
The limiting mechanics are there, because a large majority of the vocal playerbase agreed on them.
Wizard mode. It's something a lot of people want to remove and I've seen serious Wizard rounds before.
TL;DR: Be the change you want to be, maps don't really matter, majority rules, wizards can be fine.