A team of go players usually is not much stronger than the best player of the team. I won't be afraid of playing against a team of players a couple of stones weaker than me. None of them can come up with moves beyond their level so their strategy won't improve. They could get more accurate at reading and that's worth something.
Blitz go would be even more heavily favored toward AlphaGo. AG didn't spend more than 10 seconds or so per move until the meat of the midgame. Human pros were losing blitz chess long before they were losing long game chess.
