I liked how it was set more in the past (despite it being an alternate universe, i still dont completely get the madoka timeline thing lol), after Kyoko just made her wish and a few months after Mami made hers. It showed more character interactions that we didnt really get in the first one, like Madoka and Kyoko, Mami and Kyoko, and Sayaka and Homura. You get more attached to the characters aswell because you spend more time with them and learn more about them. The artstyle had very few changes too but it still worked well for the most part.
The problem with the artstyle though is probably the fight scenes which are really hard to follow because at first glance it just looks like a jumbled mess. The first one had this problem aswell, which i was hoping would be fixed in this one but if you arent one of those people who point out every small issue it can be pretty easily overlooked.
It follows the same theme of starting out tame but then getting darker over time but it is less obvious because it assumes that youve read/watched the main one first, which if you havent already you definently should because it gets pretty confusing if you havent.
