"Let it deal critical hits when normally mini-critting or just remove the mini-crit backstab radius"

This alone would make it the most op knife in the game

Yes because 1 buff banner soldier when the spy is behind will wipe the entire enemy team

^dont forget that their using the Direct Hit

This has nothing to do with the icicle or the identity of the weapon.

literally just decrease the health penalty and add an afterburn immunity and its fixed

I hate the mini crit debuff. There are hundreds of times I could have gone on a massive chain stab but my knife mini-critted a heavy when I directly backstabbed them

They shouldn't exist but they do.