Here are my own summaries :

1. The FA matches are crazy. There's even a 6* FA finishing 4th while fighting 5* FAs

2. Oh gods, the Ads system. It's so terrible right now.

3. The recommendations system sucks so bad because you get the players you don't want and they are too random

4. The tutorial is so annoying. Previously you can choose what to do first, but right now, you are always have to follow the steps. Even the auctions where you cannot choose the player you want but rather a random 4* man chosen by Nordeus

5. F*** the official store. Previously you can buy these stuffs with tokens but now, you HAVE to use money. I mean WTF?!

6. You still cannot use dash to rename your players so good luck in trying to change the jersey number of a North Korean with the new version!