Well, so far, these cards aren't trying to do any kind of fancy job matching characters to card interpretations.
Magician represents "new beginnings;" Marisa probably represents this best.
Kaguya should have been the High Priestess, in that case.
The Emperor is a masculine counterpart to the Empress; potentially, Marisa could also be this card.
Keine as the Hierophant is playing too much on her were-Hakutaku status; Youki, instead.
The Hermit ... don't know.
Death as Yuyuko is good.
Temperance would work for Letty, while Cirno needs it. I'm thinking Meiling and Sakuya, people caught between the service of devils and diplomacy with humans.
Yay, serve the Princess Eirin.
I don't know about The World (muda muda). Reimu might fit, though I had envisioned her as Justice.