I adore Jeremy, and I built my currently-in-progress Broadway binge trip specifically around this show. I saw him sing live once before (with the Houston Symphony in October 2017), and saw him on Broadway in American Son.
He was charming as ever, and it was definitely exciting that he teased a pending return to Broadway (I'm hoping he was referencing In The Light, the new musical by Michael Mott that he's been attached to for a bit).
On the downside, is singing tonight was unfortunately not his best. He's been sick recently, and was still coughing, and he hit some bad notes (which I didn't know was possible for him). There was also more speak-singing than he usually does, and a lot of the subtler, held notes that he usually does such a beautiful job with got lost. During the first verse of She Used to Be Mine, I actually wondered if Seth was playing the piano louder than it would normally be played in that section in order to provide cover for Jeremy's voice.
I do not fault Jeremy for this whatsoever, and would certainly rather hear him sing a little rough than not at all. People get sick, that's life. On the whole it was a great show and he is wonderful and I will be among the first to buy tickets to anything new he does on Broadway.