I know it's probably too late, but I'd still want to voice my opinion.
1. I like the kamikaze mechanic as it is now. Call me noob, or 'legitimate strategist', but I think it brings some chaotic fun into the game.
2. I understand it has already been nerfed, so why not nerf more?
3. I had another idea which is not listed here - suicide bombing. Hear me out, one cooks the grenade, but it doesn't explode until it's released. So, one can't exploit it to insta kill, but it can still be used as a defensive strategy in CTF. (Which is my fav mode, and kami is my fav 'legitimate strategy', so...)
I do understand though that the train is probably already gone, because I hear all the time from kamikaze haters that it'll be soon gone.