Disagreeing about the rules is not a violation of those rules, I agree. But it is a statement of intent that you plan to not follow the rules if you win your court case, which means...you won't be playing by the rules. Seems perfectly reasonable to me that Apple wouldn't want to give Epic access to their user base back while Epic is trying to reverse the decision.

Now, if Epic was not appealing, and Apple refused to let them back in, I would agree that is egregious.