I've run through most of the tracks, so... unsolicited opinions time! :3
I'm kinda hoping that some tracks will have arranged versions in the final game, which is why I'm bothering at all even if Nicol isn't on the project anymore.
Generic Happy Music: I tended to mix up this song with The Student Council -- they go together well.
Lullaby of Open Eyes: I like this one. Really, for whatever reason, I like musicbox-style music in general.
Passing of Time: I dunno if this is meant to eventually be listened to in full at some point in the game, but it makes a good 30-seconds-ish piece. However, if properly arranged, I think the base melody could actually carry it for 4 minutes -- and then there'd be no need to make the loop transparent.
Rain: Not quite as good as Shadow of the Truth, but complements it well. Sounds like the
Aqua Rock music from Golden Sun 2.
Romance in Andante: I don't particularly like all-piano pieces; I prefer them to have at least a subtle accompaniment. And this one is especially short. Also, when you plan on having a song loop, I think it shouldn't sound like it just ends only to have it start up again -- it's basically the opposite of a DJ ending his mixset with a track that actually sounds unnatural if it doesn't have another track after it. Use only in short bursts.
School Days: Kinda meh for my taste, but I would like to hear the flutey thing in another song with a more prominent role -- maybe with something slightly celtic or folkish.
Shadow of the Truth: Anyone who hears this song during Act 1 will know immediately that they royally fucked up. Powerful, depressing music, and very flexible as well as long enough to carry any depressing sequence -- but should be used sparingly. Reminds me of something you might hear during an RPG dialogue sequence. However, it loops far too abruptly, like it got cut off 90% through the track (and it probably did).
Standing Tall: I think this one should be arranged into something longer and fuller for the more important parts during Emi's path. It takes too long to get to the synthy part, and when it does it's shorter than the buildup, which... kinda doesn't make sense if you're gonna use this track a lot. But used in short bursts it does very well.
Aria de l'etoile: I start this one, hear something beautiful, and listen to the rest of the song hoping that all of the instruments will soon burst forth in a symphony so incredible and emotional as to give me goosebumps. The piano comes close, but the song never achieves what I'm hoping for. I realize not every song like this is meant to make me choke up and cry manly tears, but this particular melody could be arranged to do just that with such minimal effort given the foundation, especially if it were made a minute or two longer to make room for the symphony.
Stride: Somehow I missed this one for months, and I love it -- a close second favorite to The Student Council. It sounds like a smarter version of music you might find in The Sims. All of the instruments -- except, ironically, the drums -- have a confidence and fullness to them. And at the times where the drums go away and the instruments calm down, it builds anticipation for when they come back in a short while. It appears to have a transparent loop, which is good -- all tracks should aspire to loop as well as this track does.
The Student Council: My favorite. It has a full, driving, uplifting sound that really captures the Shizune/Misha pair. Can you tell that I like anthem trance and power metal if this is my favorite song?
Wiosna: Calm, comforting, familiar menu music. Not something I'd deliberately listen to for an extended period of time (like I am now huhuhuhuh), but I don't mind it if I'm browsing through the gallery or whatever. It has a specific job and it does it well.
Keep in mind I'm listening to these through the jukebox, obviously, so my complaints about looping may not carry over to the actual game if F/SN is any indication, though I distinctly remember hearing tracks loop within the game.