While I know KO's would be kind of cool, I don't like the idea. First off, It would mean in mods that we have created before this is implemented would have to be changed in order to add this effect. Second, how would dm's work? They already start you off with a full body relax which is enough of an annoyance already, especially when they're random (which would probably be even worse with KO's) and considering the fact that some dm's should completely paralyze you. There's no way to balance an idea like this. Some things fracture when they should Dm. Some things Dm when they should fracture. Adding KO's would be just another layer to add and a broken one at that, if they don't get the correct(by correct I mean exact) Ko/Dm/Frac ratio. It would require a whole engine change. Toggling this won't help because then you have to change the frames and the threshold even though you don't even know how the hell it's supposed to work. If you get a knockout but it's only for 20 or 10 frames, what's the point. If you get a knockout that has the opponent Ko'ed for 60 or 70 games, it's a freebie. Lastly, the whole point of Toribash is to make cool saves and have great games. All people will do in Ko enabled mods is decap opener and/or head rush kick(depending on the mod). It will become not only boring as hell if you Ko your opponent, it become overly difficult and stupidly hard to win if you've been Ko'ed. It's also very easy to farm public servers by just quickly hitting the head. They made mods and scripts for a reason. It's for people who want to do things like this, but have to many downsides on Multiplayer to really have a good impact on the game.
Sincerely,
Qukslice