Gaming for double the fun!

So I have an idea for something.
Team Fortress -2 (probably going to be called Team Fortress Minus 2)/TF-2.

Basically, it flips all (flip-able) attributes of non-stock weapons. Like, if a stock weapon (Minigun) has 200 ammo, and an unlockable (Natascha) usually has +50% ammo (300), it will be turned to -50% ammo (100).
That will account for all attributes that go in either whole numbers or percentages.
So something like afterburn immunity (Chargin' Targe) will stay, but since it does usually have +50% fire damage resistance, that will be flipped to -50%, so any direct fire damage deals a bit more damage than usual, and the +40% blast resistance will be turned to -40%, so Soldiers can also deal more damage to you than usual.
Oh, and the Pain Train will thus be a direct upgrade from the stock shovel/bottle o' scrumpy in game modes other than Attack/Defend and Control Points, King of the Hill and Arena, and Payload and Payload Race, since you will have a capture rate of 1 less (0 total), but you will have +10% bullet resistance, and most weapons deal bullet damage.
Some weapons become direct upgrades, and some direct downgrades (Gunboats, for example, as they remove your shotgun in favor of making you deal 60% more blast damage to yourself). But most can actually become interesting trade-offs, I guess.

Note: It will only affect shown attributes (the ones you can see by hovering your mouse over an icon in your backpack), so "hidden" attributes don't get altered.

This idea is silly, but if you guys would find it interesting, I wouldn't mind trying (TRYING) to make it happen.

~Zappy