I am ecstatic to see these new game modes!
After that update with the Radio songs with special features, I was kinda wishing there was a way to make that happen for normal songs -- this is an excellent way to go about it. I was hoping for a 100% accuracy type mode. :3
My only suggestion is, yes, you should work towards making them selectable features in-game, even if it would need to temporarily alter the Mp3 meta-tag and then change it back afterwards~~? Not that this is hard, but it would likely be more user-friendly that way. <3
Also, yes, I feel I should notice that in four-lane mode, my favorite mode, Pointman Elite, gets all screwed up. Can't drop blocks into the fourth lane, and sometimes will drop blocks into the lane just to the left of the one you're trying to drop them in. x3