I believe The Beatles: Rock Band came the closest to being perfect. Eveything about that game was just beautifully done and the only things missing was Pro Drums, an option for Keys, and a few more Beatle songs (Hey Jude, Strawberry Fields Forever, Yesterday etc. etc.)
Setsuna had a lot of cool throwbacks to Chrono Trigger, but ultimately, it was just okay.
I found myself more excited for what would be the next reference in the game, more than being excited about the game itself.
I was really disappointed in Setsuna. I was looking forward to it so much (not even in a this will be the next Chrono Trigger way, just in a this looks like an awesome retro style jrpg way) and I barely made it through it.