Honestly, since XY basically made Performances to be "Contests, but without battles", I'm honestly not surprised by the focus on giving girls the cute Pokemon lately.
Also, to be fair, Misty and Iris were the tomboys of the female main characters (does being a wild girl count as being a tomboy? I dunno), so it's not too surprising that they had a nice balance of cute and tough Pokemon.
Dawn was definitely the best example of a good balance, though. If only because she's the last female main character to have a full team (sob).
Lillie, Mallow, and Lana really lean on the "stereotypically girly" side of the spectrum, what with their love of shopping, makeup, and interest in marriage, so if they ever get any future captures, I doubt it'll be anything not cute. If Lana really does get Dewpider, I can't see it evolving.
I feel that Togekiss still counts as "cute". It may be bigger, but it's not the mammoth mammoth that Mamoswine is, that's for sure.