After watching a stream by one of our local players last night, I can safely say that ZUN successfully captured the essence of "I Wanna be the Guy" in LoLK. Several spells were simply "grind until you find the right way to advance", which might be a turn-off for some players. Obviously, this is somewhat of a radical departure from the Touhou we're used to, because the mechanics of the game make it feel like some of the side games instead of previous mainline/whole-number games.
Gameplay talk aside, the music (at least from the stream) sounds as good as ever, and I'm sure remixes will come shortly after. Character designs are a mixed bag, though I won't talk about that too much since we all have our own opinions. Graphics are similar to DDC from what I can tell, so that's that.
Needless to say I'm looking forward to buying and playing this game once it starts selling on Playism (or somewhere similar), and by then I'll likely talk a bit about gameplay from my own point of view. I might even post a video of my first playthrough...