It should be. It's awful. I watched two eps and never went back.
Saw a brief interview with Dushku. She said (paraphrase) "Echo's going to get a chance to develop her character and personality."
Huh? How does a character develop when they have no mind of their own?
Well, it’s been extremely heavily implied/shown that when Echo is ‘wiped’ it doesn’t really erase all the memories, it just represses them. So, she’s simultaneously got no mind of her own and the minds of everyone she’s been so far, sort of like she’s got DID with ‘Echo’ being the dominant identity.