I assumed they binned her wrestling training when they decided to make her a valet, she's never even wrestling so much as a NXT house show. She's never going to learn traveling on the road at any rate.
Devin Taylor in NXT does interviews on TV, but she also trains as a wrestler at the Performance Center, same with Brandi Rhodes who does the ring announcing at NXT. They don't wrestle at the house shows til they're more ready.
Lana is no use as just a valet, that has a shelf life. As a valet and a wrestler, she has a lot more value.
The only girl who seems to have no wrestling training is Eva Marie, she seems a special case for the Total Divas garbage.