It makes sense to keep it the way it is now because you still somewhat have control until the very very end of the game when you get dragged away, and the game truly ends after that

The rules have always been all over the place across all the games in regards to the 30 kill challenge, Black Ops II is a glaring example of that. By use a radar I'm assuming you meant radar always being on? That's been a thing for well over a year now I believe. There already is the basic ruleset in place, ho hardcore settings and FFA only too, unless you had something more in mind?

Yeah, it's a bit late to change that since it's been going on for a year and that'd be a decent chunk of runs to just up and reject.