Review of Overlord II

After Overlord's first season, full of badass characters and shows of power by Ainz, second season had a pretty rough start. Focus shifted from Nazarick to side characters, with Ainz and co. taking a back seat. Without a doubt, such change will disappoint people who watched this anime because of OP main cast. Still, it doesn't mean second season itself is bad. It's just different. Story moves from introducing Nazarick faction (first season) to outside world. Now we see lives of humans (and lizards) of Yggdrasil and Nazarick's actions from their perspective. And it rather is nice thing to see, especially when they actually show theirpower.
I'll agree with many opinions that first arc was weak. It was far too long for what happened during it. And while 2nd arc is much more reasonable, the last few episodes more than make up for everything bad in previous 2/3 of anime.

New characters introduced in 2nd season are an interesting bunch. Yeah, lizards are forgettable, I won't talk about them. But whole Blue Rose, especially Evileye and Lakyus, Unglaus and of course Renner, are really good characters that don't make you just wait for Ainz's appearance.
This season also brought considerable development for Nazarick NPC's and shown their loyalty to Ainz.

I've never watched this anime for its art or music, but I have to admit those were good. If you skip openings then don't. This one is solid.
While fight scenes aren't that special, they are pretty enjoyable. Animation is good and moves make sense. I'd even say there were some above average fights in this season.

Generally speaking, if you liked first season, you won't regret watching second one. You might not like it at first, or even be disappointed after finishing, but it's still a good anime. Don't get discouraged by slow start.