I didn't even bother to read any further because you clearly know nothing about tanks. Now, when I was talking about AV, I was talking about it from my own point of view. I don't consider myself in any way a good AV player and I have yet to come across any tank that wouldn't either get destroyed by my alt's Proto Swarms or go into hiding and eventually possibly even recall.
Now, you are also assuming that everyone uses controller because active tanks are broken on KB&M so I'm just gonna say that the best fitted passive Armor tank loses all shields and 1/4 of armor when the first volley of Proto AV with damage mods hits. Guess what happens when the next volley hits? Which happens to be before repper has activated (YES IT TAKES 3 SECONDS TO ACTIVATE). The answer is we are on fire. A lot of good that repper does at that point.... Oh and yes of course I am assuming that I am getting hit from behind because only an idiot would engage tank from the front unless you are out of tank's draw distance or the tank is already at low health. Oh sorry, I forgot that even if you engage tank from the front you can still destroy the tank in 3-4 shots of Proto Swarms. I rest my case.

Proto SWARMs destroy well fit tanks with good drivers easier than I can with my Ishukone Assault Forge? Maybe I speced into the wrong AV... No. I love my forge.

Forges are perfectly fine, I don't think they need any balancing done. They take skill to use: they need to be charged and aimed and you are slow when you are charging it, heck, you are slow even when not charging it because you gotta run heavy suit.
If Swarms were skillshot weapons like Forges I would have no problem with them at all. The only problem I have with Forges is the render distance. They can see me from 4x the distance that I can see them. Even being high up in a tower or table top doesn't bother me, they have to actually get up there and then it becomes even more skillshot due to the distance.