Rian Johnson seemed like he was setting up as Kylo as the main villain. (Which if you read JJ Abrams script was fair--he committed an arguably irredeemable act by killing a main character)
Wouldn't she have been safer with Leia and the Resistance? Oh well, I'm sure if Trevorrow had taken it over it would have been something similar--each director/writer has their own vision for the series without any care about writing a cohesive trilogy or story or consistent character arcs.for it to have been revealed that she was the daughter of Ben's nanny/governness/aid of Leia's. Who Leia recognized had force potential and was sent away to protect her.