Rey's force abilities are just an easy out for the writers and Disney.
If she can accomplish what she did without any formal training, imagine what she could in her fathers care -She'd make Snoke, Ariel & Palpatine's ghost all look like 3 year olds in the ring with Ali in his prime.

It's bad enough we had to sit through the Death Star battle for the 3rd time, I'm just glad they skipped Rey standing on her head levitating rocks in a swamp, while Maz gave her tutorage