It's ok! let me try to answer these questions based on what I heard
1. The song was not boring or monotonous at all. It's quite emotional, but not too dramatic or anything. A bit uplifting, though I don't really remember. It also sounds like an anime theme song I heard before hehe. there is a rock tinge, but it's not that heavy.
I'd probably categorize it similar to moments or no way to say in terms of how it sounds music-wise, but in emotions it conveys, I think a bit similar to meaning of love.
2. Audience reaction was ok, during the song I think people were very silent since we were focused on it, though some arms were waving here n there. When the song ended, everyone clapped, she asked our reaction and we all applauded
Oh, I think she forgot the lyrics for the verse and people screamed "ayu!", hehehe.
3. I think based on my answers, you can see that I liked it
imo it's like a rock-ish meaning of love, which made me like it so much. I wish I recorded it, I was very surprised to hear that since I heard the thursday show still had meaning of love anyway.