Yeah, I feel like we needed just a little more time with Barriss for that final turn to work. Though I wish, as with Krell, that disagreeing with the Jedi didn't automatically mean they'd fallen to the dark side. Like, Krell could have just been super bigoted against clones! And Barriss wasn't actually wrong; it was just her methods that were bad. I get why they went that route, but I kind of wish they hadn't.