Breh, are you playing the Legendary Edition, or just using this thread as a therapy session for your issues with Andromeda? It's alright, man. The game's dead. It can't hurt you any more.
Kasumi as a character is all kinds of confusing. She herself is mediocre as fukk, and you can see where she is a bullshyt tack on DLC. But everything surrounding her is good. The side mission with her recruitment/loyalty is a fun diversion from everything else going on, and Shadow Strike might as well be a gotdamn cheat code. It got to the point where I would often just run a squad with her and Miranda because it was almost unfair using anyone else more useful in the second slot.