That's a supermajority in principle, but the board originally had 9 members and this is clearly a controversial decision and at least one board member is conflicted, and another has already expressed his regret about his role in the decision(s).

So the support was very thin and this being a controversial decision the board should have sought counsel on whether or not their purported reasons had enough weight to support a hasty decision. There is no 'undo' button on this and board member liability is a thing. The probably realize all that which is the reason for the radio silence, they're just waiting for the other shoe to drop (impending lawsuit) after which they can play the 'no comment because legal proceedings' game. This may well get very messy or, alternatively it can result in all parties affected settling with the board and the board riding off into the sunset to wreak havoc somewhere else (assuming anybody will still have them, they're damaged goods).