The new teams or the old teams? I'll start with the old teams.
Team A
Strong: Many cool girls, who know how to promote themselves
Weak: Musically not that interesting, too many 'keyboard driven songs'.
Team K
Strong: Good vocalists, good dancers and they have had some great stages.
Weak: The members are too versatile. I know Team K gets a lot of "they're a real team!" but I never really saw it.
Team B
Strong: Amazing energy, positive vibes, many guitar-based songs
Weak: A lot of young girls and not many girls with 'mass appeal'.
Team S:
Strong: Great dancing, energetic
Weak: Too many young girls
I'll probably write some more later, but I'm tired