I saw the show today and it's in pretty good form for a second performance! Corbin Bleu sings well and pulls off a convincing Seymour. Constance Wu was also quite good, though I think she could use more time with some of the material. Her Closed For Renovation wasn't quite as peppy as I wanted it to be but I think her big numbers were great, and she's a great actor. She doesn't do the "Audrey voice" and for the most part I think she uses her natural accent but I think there's a bit of an affect on top of it, which generally worked well for me, and I thought her singing voice suited the character well too. I had only seen Christian Borle before in the role of the dentist, and while Bryce Pinkham does some great character work in the second act, I think Christian Borle was able to pull laughs a little more effortlessly, but it wasn't a big deal.
I feel like I've noticed this issue before, but the sound balance on the Urchins felt a little off to me, the harmonies not gelling quite as well as I'd like, and they seemed to be mic'ed higher than the other actors. Audrey II could be a little tough to understand at times too, especially when the full band kicked in, but my friend who had never seen the show before didn't seem to have trouble following along.
We stage doored afterwards and most of the actors came out to sign, though Constance Wu didn't stop for photos (Corbin Bleu came out a bit earlier and a bunch of people left after getting his signature which was nice since it freed up space).