You think so? To me, I think she needs better tactical knowledge TBH. Against Stephens she was trying I/O FH all the time while Stephens loves not to move and was to happy to counter her. Against Bouchard and during her previous match (her opponent forfeited), I couldn't determine what she was trying to do. At points she'd chip 'n charge on clearly wrong balls even if she's good at net. A match that was a good chance since she was seeded #2, Bouchard was seeded #5, and the number #1 seed got knocked in first round. I know it's hard against the talented local player, but still... She doesn't play a game, she plays shots, tries stuff. A bit like Kvitova. Kvitova always tries stuff, flashy things, has great shots, and makes stupid mistakes tactically speaking and goes through matches like a shadow.
And despite her size (6'1"/1.85m), I don't find her serve consistent enough enough as a weapon. Or at times too predictable: on ad side she always serves a kick to the BH on second serves. Always. Almost like Robson with her perma-slice on the second serve on deuce side (plus frequent mental collapse on her serve in the end of sets/matches). It isn't as terrible as Sharapova (post shoulder injury, but she doesn't seem to care anyway), but it could be much, much better. A great example would be Venus prior her health issues who used her size greatly. Mladenovic at times pulls crushing serve winners, and at other times she just gets the ball in play with her uber predictable second serve.
If tactically speaking she makes progress, she's Top20 material for me. If her FH and serve become even better she's at least Top15 because she has good tennis instinct, but lacks diligence. Or she'll play mixed doubles with Nestor. Funny she has really good results in doubles with four titles, or even mixed with titles in doubles and one slam semis (USO), one final (RG) and one title (SW19) this year. Maybe she's more tactically focused since she has to work with a partner, who knows. Or maybe she's that good at net. she has the shots to do so. But she lacks the little "something".