I'm not sure that I'd go so far as to say "non-sexualized." She's still in kind of a weird pose with those ballerina-pointing feet and those akimbo arms, and the lighting on her waist, and the light she's holding is all "Hello, cleavage!" I'd be interested to see this picture Hawkeye'd. But it's no DRAGONBRO AND T&A MAGE, and that's cause to be happy. She's at least subtly sexualized. And she is leaping through the air to assault a giant, which is cool and heroic.
She's holding a staff and her hand is glowing with weird blue light. That strongly suggests "wizard," which implies that she's levitating, not leaping. Hence the pose. The 1E Manual of the Planes had a male wizard doing something similar.
...Though, looking closer, she does seem to have a bit of the 4E T&A Mage's "arching my back and sticking my rear end out for no apparent reason" going on. The resolution is low enough that it's hard to be certain. Anyway, as you say, it is at least much subtler than previous PHB covers.