I don't know why anybody's doing anything except Dolores. She at least has a motivation even if they're still trying to drag out her arc by having her speak cryptically all the damn time. These shows always end up victims of their own success by trying to drag it out long past its use by date.
I have no idea why Maeve and Dolores are fighting each other. The person Maeve should be pissed at is Serac since he's essentially enslaved her again. Somebody decided it'd be cool to have two hot chicks in leather fighting each other and that's just so damn sexist that the show's ostensible feminism is falling flat.
Even Dolores is like, "why are you doing this?" and Maeve is just "I don't know, let me blow your arm off though, that'll make a cool visual".
Dolores created versions of herself that she let die. That's literally the opposite of somebody who only cares about her own survival. So Maeve's "revelation" that Dolores was willing to sacrifice herself at this juncture made Maeve look like an idiot. And the last person who should be looking like an idiot is Maeve.
Seriously, this was NOT a good episode. It was almost juvenile.