I don't like the reflective floor too much. She's supposed to be a dancer, not an ice skater!

As these aren't performance clothes I'd throw in a few shots of her leaning on the barre, stretching, rehearsal poses etc.

Big closeups of any included textures and if some parts of the clothes bend really well throw in some yoga poses to really show them off! Look at dancewear catalogues for finding good poses to show off leotards.