I think the biggest issue here is that this was a missed opportunity for the upcoming Trump administration to help ease some animosity among the dissatisfied people. The problem is that he didn't take that approach, and I think that may end up being something that we'll see repeated if he doesn't try to nip it in the bud. People may not like it, but the president should try to act diplomatic in situations, and that normally includes trying to listen and remain stoic regardless of the situation. He could have literally stated the same displeasure in a much more diplomatic way with something like, "To the Hamilton cast, we understand and would prefer if you brought the issues to our admin rather than during a show." You try to appease a bit (the proverbial pat on the head) while still getting your point across.
Honestly, I'm kind of disappointed. He came across as far more likable during his acceptance speech, and I had a feeling that maybe a lot of what we saw really was a bit of an act like some suspected. However, this seems like he's taking a step back.