I was there tonight and quite enjoyed it. I'm a huge fan of the material and of many in the cast, and was excited to (finally!) see them tackle this show, after initially purchasing my ticket in January 2020.
I loved Doyle's take on Passion at Classic Stage but was underwhelmed and disappointed by his Pacific Overtures, so I was glad that my feelings about Assassins landed more in line with the former. It's true that this production doesn't present some kind of radical reinvention, nor does it necessarily find anything fresh in the text. But it's well cast and well paced, and I'm grateful for the opportunity to see this material shine in an intimate setting. I was also glad that this production didn't lose any of the show's humor - I always forget how damn funny Assassins is whenever I'm just listening to the score.
I did find the few aspects of the production that referenced current events to be somewhat distracting, as I didn't need those parallels drawn out for me so explicitly. Masks have very much been incorporated into the costuming/concept of this production, and there's a moment during the finale that felt a bit too heavy handed for my tastes. It's interesting to wonder how this production could or would have been different had it happened along its original timeline, as there are so many events from the past 18 months that have sharpened its critiques of this country.
I enjoyed the design more than I was expecting; it's certainly more than just the chairs that others have mentioned in this thread. I found the thrust set-up to be used effectively, and had no issues with sight lines/seeing their backs too much/having actors block the action.
So many of these performers seemed like perfect fits for their roles when casting was announced, and all of them deliver. Steven Pasquale is just as good here as he was in the 2017 Encores! production, Will Swenson seems like he's having a ball with Guiteau, Judy Kuhn is a riot as Moore, and Brandon Uranowitz deserves props for the understated rage he brings to Czolgosz. But, really, there's no weak link here. Ethan Slater had one moment during "Another National Anthem" that really impressed me, and was different from anything I've ever seen in that song.
I'm hoping I'll get the chance to see this again before if closes (now more of a possibility, thanks to today's extension announcement), it for no other reason than I find Assassins to be a truly remarkable piece of musical theatre. It's that rare musical that's as hilarious as it is heartbreaking as it is harrowing, and it's not every day that I get to see a high quality production, even if the direction wasn't always up to par with the material.