I've been getting the feeling since DDC or possibly even MoF that ZUN's running out of Japanese youkai and now Japanese gods (at least, ones he wants to make into Touhou chars)...
I see your point. As for me, I get the feeling that Zun is taking more and more risks by creating different characters that he used to do.
But I don't know . . . I feel less and less interested in new touhou games. I don't want to play the "It was better before" but I'm not so thrilled as I used to be when I played previous games. And even now, when playing these games(like IN or MoF for exemple), I feel happy to play it. Since TD I don't get this thing, or more accurately this "touhou thing". I don't think that I'm uninterested in touhou anymore since there's so many things I love. It's the new games . . . I'm not happy as I was. I think that's just me though, so I won't say the games are bad or something like that.