If the court gets to decide what is or is not an official act, then they effectively get to control what the president can or can not do. They've already shown that they don't care about precedent, so they'll make those decisions based on their own (or their patrons') momentary convenience. That makes the executive the puppet of the judiciary. Instead of one king we have nine. Happy 4th of July.
The president should be able to vacate the court as an official act as well, saying they're betraying the constitution and stuff like that. Happened at every banana republic out there before.
