I'm very curious as to where ZUN can go in Gensokyo he hasn't already treaded. We've been to mansions, the netherworld and subsequently exploring Winter, the bamboo forest and subsequently exploring nighttime, the mountains and exploring Spring, the youkai mountain and exploring fall, the heavens, underground, and back to Makai while exploring the sky. About the only themes I can think of that ZUN hasn't focused on are water and forests, and since Gensokyo is landlocked...
Anyway, what do I want to see? NO MORE HITBOX SIZE DIFFERENCES. Make a freaking second loop if you want, just don't make me blacklist a bunch of shot types just because they have fat hitboxes.