Could it be that there is only one single way to make sequels to this type of competitive song & dance film?
That would certainly account for the uncanny and embarrassing likeness of 'Pitch Perfect 2' to, say, 'High School Musical 2'.
On the plus-side : Witty dialogue! Girl power! Chipper song & dance acts!
In short, everything that made 'Pitch Perfect' worthwhile.
On the downside : Irritatingly ostentatious product placement. 100% predictable plot.
Conclusion : Like with most other sequels, you can pass on this one, and be none the worse for it.