Overrated: Reverse seal Tsunade - One of the most annoying ninjas in auto combat (such as SpaceTime). She is definitely strong character, but in all you need to deal with her is some simple control (interrupt, CD increase). When you can manually use your team, she is not that amazing compared to say Karin Taka. which is in same pack.

Underrated: Shisui (Kimono): His SB standard causes undodgable ignition which cannot be cleased. Such as that, he completely shuts down any healer based team (Karin, Tsunade etc..) as well as partly shuts shield teams (Madara, Suigetsu etc...)...