"2 discs" doesn't hype me much unless they announce more than 2 hours of music.
I'm guessing the soundtrack will be about 1h30 long as usual with 2 discs, but could it be more? As
@grunty has said with (the rips?) over 1h20 long - add to that the cut-segments, new tracks, the song but also remove some "different layers arrangements" (#2, #3 or ~vc only~ that may be in the rips (?)...).
I bet it's either going to be:
(1) a Zaregoto-like soundtrack (for the exact reasons
@grunty has said)
(2) a PriPri-like soundtrack (this one also has ~40 tracks, some "long", including songs...).
If 1h30, I'd rather have (1) with some long tracks standing out.
If >2h, then (2) with a decent average track length (unlike PriPri because 1h30 long)