or, perhaps, with less attachments being available for a perfect meta build on every gun all the time, attachments will be used less by everyone and you wont "need" HP rounds, a laser, a switch, and a suppressor on your gun at all times to be pvp competitive.
I am all for making the server less PvP focused and making PvP more realistic. Make guns less constantly kitted out and super powerful and used 24/7. I like it more when people do things like use bats for defending a store and break out the guns when shit gets really tough, which could mean breaking out a kitted out gun from a locker or an ATM, or maybe equipping a less advanced gun from your inventory, etc.
As for rule breaking, you can't account for everything when it comes to people straight up breaking the rules. You could argue against anything if you argue about people breaking the rules. People will just have to get banned, and you get comped for as much as possible.