body length wise, this Krystal clocks in at 6 heads, which is almost what real people have, so the parts of her that differ from human proportion stand out more than other cartoony/exaggerated stylization's. The thighs and torso have been mentioned, but along with that, I'd say are also issues with the upper back and shoulders, arms and her pelvic girdle. Normally I wouldn't dissect the issues I'm seeing, but it looks like this would be a nightmare to functionally animate because of the flaws, so I'm going to break things down as I see it:
At her increased proportion basis, her forearms should be longer. Where the fist ends is where the wrist should start. As is, she looks like she'd have difficulty just playing with herself — though it might not seem it since her pelvis is too high. Lowering the pelvis and extending (and thickening) the thighs and pushing her body height (and proportion) to 6.5 heads would help her look better and give her room for getting penetrated without being pumped in her stomach right from insertion. In addition to needing a bit more thickness at her torso, her back arch is way too steep and peak's at the wrong spot (so that strap there looks weird) and she doesn't have enough connective area for her shoulder closest to the audience — it looks like that arm is dislocated and that she doesn't have shoulder blades or ribs. Ah, and the shoulder starts too far back anyway, so yea, I guess that shoulder is dislocated.
The face is fantastic and, as a still, the rest at least looks hot, but with a bit more scrutinization, it seems it'd look pretty weird animated, esp for sex.