Having seen the Japanese version, I can offer some thoughts:
I like Birus. He doesn't come across as outright evil, more like he's a god and the earth is nothing to him, as a person would see a speck of dust. He's actually quite fun and his presence making everybody that knows him frightened while others are just acting like he's another guy.
I was disappointed in the Super Saiyan God form. The skinnier frame kinda made me long for the Super Saiyan 4, but it's heavily implied this is a temporary form Goku doesn't need any more after using it once. The concept of god energy also gave way to suggest there are other characters that could be comparable to the Saiyans now, even give the other characters a chance to shine again (similar to how Uub was strong enough to go one on one with Goku despite being a 10 year old human.)
Didn't care for the CGI. It doesn't blend well with the 2D animation.
It had a lot of genuinely funny moments. Vegeta dancing and singing to keep Birus from getting mad was hilarious.
The fight between Birus and Goku was rather weak. Compared to other fights where the blows exchanged caused the earth itself to shake or just powering up caused nearby areas to start falling apart, it just didn't have the same impact. Goku and Birus fighting should be cause for concern since every blow should be causing damage everywhere, not something that seems to barely register.
Flow's "Hero" song is great.
I hate that Gohan keeps getting smacked aside with 1 hit. Toriyama states he's the strongest non-fused being even compared to SSJ3 Goku, yet in everything post DBZ he keeps getting brushed aside as if he's weaker than Piccolo or Vegeta.
Overall: Could have been better, have seen worse DBZ movies, am hopeful this can lead to a new series.
I was disappointed in the Super Saiyan God form. The skinnier frame kinda made me long for the Super Saiyan 4, but it's heavily implied this is a temporary form Goku doesn't need any more after using it once. The concept of god energy also gave way to suggest there are other characters that could be comparable to the Saiyans now, even give the other characters a chance to shine again (similar to how Uub was strong enough to go one on one with Goku despite being a 10 year old human.)
Didn't care for the CGI. It doesn't blend well with the 2D animation.
It had a lot of genuinely funny moments. Vegeta dancing and singing to keep Birus from getting mad was hilarious.
The fight between Birus and Goku was rather weak. Compared to other fights where the blows exchanged caused the earth itself to shake or just powering up caused nearby areas to start falling apart, it just didn't have the same impact. Goku and Birus fighting should be cause for concern since every blow should be causing damage everywhere, not something that seems to barely register.
Flow's "Hero" song is great.
I hate that Gohan keeps getting smacked aside with 1 hit. Toriyama states he's the strongest non-fused being even compared to SSJ3 Goku, yet in everything post DBZ he keeps getting brushed aside as if he's weaker than Piccolo or Vegeta.
Overall: Could have been better, have seen worse DBZ movies, am hopeful this can lead to a new series.