Possibly but not certainly. It would have deadlocked the vote if a board member would have been replaced and it would have still passed if Microsoft had had an extra seat (4:2 -> 3:3) vs (4:2 -> 4:3) assuming the Microsoft representative to the board would vote against having Altman removed.

What I'm fairly sure of though is that if the board had been stocked with heavyweights rather than lightweights that this would have been handled in a procedural correct way with a lot more chance that it would stick.