IMHO:
Joelle was great. The hardest one for me to get used to with her voice was "key of the twilight" and TBH I'm still not sure if I'm on board with her voice in that one. "the world" took two listens, everything else I was fine with from the start. The instrumental on "key of the twilight" was very lovely.
One thing which Joelle did that I hated (well, there likely was more but I forgot by now so not as big of a deal I guess) was in the first lalala-s of "in the land of twilight, under the moon", right before everyone jumped in. That was an instant "no ma'am" from me.
I thought Himeboshi/Mezame were great except for that last line from Yuriko in the intro to Mezame. That whine-screech was a CHOICE.
Obviously I'm disappointed this was not a real, unedited live stream rather than this pre-recorded, fully-edited&ready-4-release programme but what can we do. Other than that, yea, fingers crossed for a home video release - it would be great to have this in CDquality+ considering there's no audience noise.