Yeah, in my opinion, host migration could have been thought through a LOT better.
I mean, it's tons better than the classic CoD4 "Host Ended Game" because at least with Host Migration, you have a chance of staying in the game.
It's just flipping annoying when you're in a UCK (User Controlled Killstreak) and Host Migration occurs. Not only do you either lose a pred, or lose 10 seconds in an AC-130 or Chopper, but you have a chance of being kicked and losing your precious killstreak.
It sucks, we know. But meh.