Nice deck, like Josh said Nabrissa would be your next option after her price drops.
You could just leave the deck as it is, it's a nice deck and doesn't need any real changing. I can't help but think that Sayura is pretty similar to Kamekun, 1 power less with 2 damage more and a ability that works any time.
Kamekun's a nice card, but you could try and get Futoshi Ld in there. Futoshi Ld - Kamekun then Zhu Tang - Kusuri.
Or Yoshida - Fei/Heitachi then Zhu Tang/Kamekun - Futoshi Ld.
Kamekun sucks, him to Fei and Yoshida to Futoshi Ld. Wanda to Nabrissa if you can get.
Alternatively, Yoshida to Futoshi Ld but Kamekun to Kusuri and Wanda up to Cherry perhaps. The preferable choice, for me, if you do not have Nabrissa.
Kamekun does not suck...... cmon man