I'm a little disappointed about the lack of new songs, but after the first two albums, I wasn't expecting to see a lot of new songs on the third. Idoling!!! seems to treat their B-sides more like A-sides. I don't know of any other group that uses all of their B-sides at concerts.
I'm most disappointed about the Snow celebration remake. I know it's the fans' favorite song, but come on... It doesn't need to be re-released twice.