I think the sakura is a little bit overwhelming and takes away from the render. If it were me, I'd probably erase selectively to thin it out closer to her face so that it doesn't look like her face is emitting a constant stream of leaves. Actually, yeah, maybe it's a distribution problem that makes it look so unnatural, because the distribution is this perfect diagonal which defies the laws of gravity. Maybe see how it looks with less petals and the width decreased like shinta suggested to balance the focus a bit but still keep the same proportion of negative space, which I think would also keep the distribution from looking so artificial. Looks nice though! I really love the vibrancy of the render against the muted colours of the background.