I am a bonefied Shinkifag and would love to see the elegant demon goddess return, as well as the other Makai residents as well (because I like them just as much as I do Shinki). However, I know it's not going to happen anytime soon, I would have liked it if ZUN gave us a bit more referance toward Shinki than just an 'lol Byakuren has the same spellcard as Shinki', but I'm not one to complain, if Makai exists then Shinki must still be out there as well, I suppose...
the single gender polulation greatly reduces the yaoi ships from sailing.
I wouldn't be so sure of that buddy...
While Yaoi is rather uncommon in Touhou given we only have like a handful of males to work with, but we do have some; Rinnosuke, Genji, Youki, Unzan, Giant Catfish, Lord Tenma, Lord Nai, Myouren, and Mr. Kirisame to name a few.
So even with the 98.9% female cast, there's an oppurtunity for the Yaoi fans, and even us Hetero fans, to try their hand at something, albeit it's a limited selection.