In my very humble opinion, Moonflower is one of the weakest 5* ever. The only stat she excells in is her speed. If you want some peace of advice, save up your big manyus for
tachibana, the next event girl (most likely - unless all of the sudden nutaku stops following DMM's event order). To be honest I don't care much for the skills of either of these two girls, but I do think tachibana is stronger. I think Di yu is more usefull than moonflower. I'd just keep di yu and hold on to my manyus for a while if I were you. But hey, that's just my opinion. And also, if moonflower is a potetial waifu of yours than who cares about stats, right?
Anyways, since I'm already overcrowded with purple units, she'll be sitting on the bench for indefinite time.