Update: DD still not crawling, but has learned to move herself around in a circular motion while sitting, using her legs
So she's a bit less cranky.... Maybe she will be a bum shuffler. What do you think?
She does reach for toys, and gets down really low to the ground with one knee on the ground, but keeps the other knee up so this stops her from getting on all fours...

Marcellus - DP takes over sometimes, but is happy to let her fuss etc so I end up dealing with it anyway.