I like the direction of the changes. They feel more like a new foundation than a 'Super' upgrade to the game.
The new Story format is nice for me. I know some people don't care about all that, but I enjoyed it quite a bit once it got out of Begin City.
The new Chat has potential. It's clearly unpolished, but a step up from the previous iteration. If it taps into that potential by way of event chat options or such, it will be more than worthwhile.
Remax keeps me from doing silly things like grinding 5 levels out over a whole week. That's probably for the best...
Greater background variation and themed girls based on the background is also really, cool.
Cheaper Gacha with a guarantee option is a definite improvement.
5 girl teams is probably a better alternative to just rearranging an ever-growing list.
Rewards girls are actually worth leveling now and the rearranged power rankings make much more sense.
There's plenty of bad stuff too, but it's mostly bugs, poor optimization or other things that should resolve over time.