Today's Broadway Briefing mentioned there was a table reserved for him at the after party. Possible he just went to that, but I would imagine he attended the performance as well.
And one cannot conclude from a walkout or a not-return that the person hated the show. I have left before the end of maybe 3 shows in my life on the ground that I hated it. I have left more than that because I did not feel well or some other totally external reason.
In the 60 Minutes Interview he seems invigorated by this revival. He’s probably seen it many times. Maybe he just went to the party.
"The sexual energy between the mother and son really concerns me!"-random woman behind me at Next to Normal
"I want to meet him after and bang him!"-random woman who exposed her breasts at Rock of Ages, referring to James Carpinello