VeccI don't think you understand anything about TF2, OP
If you truly believe that, then please enlighten me on why this would be a bad idea. Calling me ignorant accomplishes nothing.
BumFreezehow would this idea fix anything to do with class limits or weapon bans? only thing it might do is stop snipers being stood in spawn doors
BumFreezemedics being able to overheal each other, demomen being able to sticky the same point/ several doors at once, engis being able to tank one building to stop it ever going down are all pretty unfixable problems. class limits are necessary.
Rescue Ranger for example is abused by waiting in spawn, healing the sentry, and then quickly switching off to a regular class once your sentry is destroyed, with no risk to yourself. A nerf like I proposed would punish this and basically give the attacking team a 5v6 for 3 seconds after taking down the sentry. The same thing applies to a sniper.
I think maybe this nerf should only apply to last in 5 cp, because that's the only place it's a massive problem. I'm not suggesting that a nerf like this would un-ban every weapon or completely remove class limits. But a lot of classes used to have a class limit of 2 and maybe we could return to that, and rescue could definitely have potential to be un-banned because it's only overpowered when defending last in 5 cp.