I've known people that worked their asses off to beat IN easy (for some reason, they're usually artists; writers and artists tend to be REALLY bad at danmaku, I've noticed), and that's fine with me. Not everyone is meant to be a danmaku player, after all.
Hey, I've been writing for years and I'm pretty good at Danmaku. Not Lunatic-clearing (yet), but I'm working on Hard and have come very close to several Hard 1ccs and almost cleared every Windows Extra at this point (KOISHI RAGE)...
...Also I love that the opener for this question mentions Genetos, considering I just beat that on Creator with an S+ while recording and am uploading that now (very very slowly D: )... but yeah. I really like the idea of an adjustable Stage Practice, considering that, for instance, always starting stage 6 in UFO at exactly 2 power is... highly unrealistic considering it's always either 1 or 4 for me @_@
My personal thoughts:
*I actually liked the UFO gimmick. One of the reasons I don't like MoF that much is that there's no real reward for risky playing (Grazing), and UFO rewarded you for risky playing in
two ways (UFOs and Graze Bonuses). I like a scoring system that rewards you more and more for playing riskier and riskier.
*More bloody unlockables! I know it sounds bad but really I'd like to have a return of Last Words or extra characters or an extra extra stage or something. Having the game deliberately reward you for doing stuff you might not normally strive to do is always encouraging (so long as its not a tedious task).
*I want to fight another player character during the next one. Whether this means Phantasmagoria or just a 4/8-style "Vs. Other Protagonist" match, I don't care. I want a variable boss battle.