For the edits that talk made to the tracklist, it seems that the track length for songs on Disc 2 of the Re:CREATORS Original Soundtrack has been revealed on tsutaya, but the track length of songs on Disc 1 still remains unknown. It's really weird, but the track lengths seem reasonable at least.
http://tsutaya.tsite.jp/item/music/PTA0000SM4MZ
I really want more information on this OST soon, haha.