Alright, here we go!

1. This would only be done to new mods, IF it were to be implemented.
2. If this were to affect TK, it MIGHT not be too bad. Assuming a person doing this would used a snap-kick, you could easily block it in less than 10 frames. As for other mods, I can't say what it would do. I'll run some tests on this.
3. I don't agree with this idea, due to the fact that it could possibly support Pay-To-Win. The only way you could possibly make this okay is to make it a subscription based thing, but a very short one. At most, a month would be semi-okay.