My plays:
Theatrhythm Final Bar Line - making my way through the songs one by one, now in the midst of FF6. Playing on Expert difficulty and doing pretty well (at least an S for every song so far). Trying to do some of the quests but a few seem almost impossible, even with a lv 99 party.
The quests range from ez pz ("use this character") to like 75% total bullshit need endgame all lvl.99 party with perfect skills. I'm not bothering trying to clear them all, but I've cleared a few just for the growth eggs they give.
I've been playing nightly since launch, about 50 hours now. Just got my last character to lvl.99 yesterday. I've cleared all the songs on the expert and I'm working through them on ultimate and I'm about 50% through. I've definitely felt my skills improve because I used to think ultimate was too hard in these games but now I get perfect chains on 10 difficulty ones sometimes.
That being said, going through ultimate has shown me the difficulty numbers are fucking nonsense. I find some of the 9s and 10s really easy and get pretty close to perfect and then I will barely pass or fail an 8 difficulty song. The difficulty rating is super whack. It doesn't seem tied to BPM at all and I'm sorry but those high bpm songs are just too fucking fast for my fingers to move and I find them really tough.
Luckily if you fail a song you don't lose the items (growth egg) that you use on them, so no detriment for just trying every song and seeing how you do.
Probably not going to bother with supreme, but will at least attempt to clear all 500 songs on ultimate before putting it down.
Still, at this point game is great. Is it the perfect FF music game? Nah, but it's pretty great if you're an FF fan.