Well, let's just say I was super disappointed. This sequel was a downgrade from First Mix in almost every way possible. The biggest problem by far was the weak plot and a very huge number of characters who barely got any major development. The first season focused mainly on the rise of HapiAra and the 4 characters got a lot of development which made the season fun to watch. This season, however, tries to achieve the impossible task of developing multiple groups in just 12 episodes resulting in a confusing mess which wasn't fun to watch. The animation was as good as the first seasonand probably the ONLY thing that this season did better than the first imo was the ending song. I absolutely didn't expect "Wow War Tonight" to be topped considering I loved it as well. The opening song was... meh. Not even slightly comparable to the masterpiece that is the opening of First Mix.

Plot: 4/10
Music: 6/10
Characters: 3/10
Overall: 5/10

In conclusion, it would be better for you to skip this one. This season would've been so much better if it focused only on the development of Lyrical Lily and kept the other groups as rival side characters (like the first season did)
:(

Peace!