I enjoy rare letters in a themeless, and Damon incorporated the Js, X, Zs so well. I particularly liked how he worked in what rare letters he could while prioritizing smooth and lively fill over a pangram (or another mostly-constructor-focused goal). As a solver, I appreciated that.
I had seen JAZZ HANDS a long time ago, but it still had a nice impact for me. And although JANE EYRE, ACHILLES, and JOHN HENRY are all proper names — generally I try to avoid proper names that either solvers will know (and love!) or not know (and probably hate, because it feels like they're being forced to learn!) — I feel like all educated NYT solvers ought to know these three. Yes, JOHN HENRY too!
Also appreciated Damon's care with his short fill. An AGRI here, an EDT there, that's solid and very smooth work.
So much good stuff made me think of this for the POW!, but I did have qualms. I had such a rough time with TRIOLET. Struggled with ELVER, and the FAUVES compounded the problem. Those might produce some probably-fair-but-unsatisfactory crossings for some solvers.
Then I remembered that I also struggled with PERONI. And HOTSPUR. Luckily, I love ancient mysteries, so the lost colony of ROANOKE came back without much prodding, but I could see that being lumped in as well.
Should I have known all of these entries? Maybe. The FAUVES turn out to be a very influential group in art. And I've used ELVER in one of my puzzles! So as a whole, maybe this handful shouldn't have bugged me.
I'm starting to rethink my construction philosophy, which has been to avoid gluey bits at nearly all costs, even if that means including more than just one "weird" answer. Enough crossword friends have shared with me the experience of a single crazy-looking answer drastically lowering their enjoyment of a puzzle. I don't think that's fair at all, but it's hard to tell people what they should feel.
Anyway, overall a very solid puzzle; loved those rare letters. Glad I learned some new things, albeit with some grumbling over the quantity of said things.