Wow...forgot to search before I posted mine D:
Anyways, for spinners I had an idea that there would be little hitcircles (like in regular osu) that you would have to get to before the timer is up. They would be ordered so you could have complex patterns (stars, spirals, etc). There would be some default patterns made for beatmaps without a DtB mode.
I also support the graze=points method. If you want a high score, you would generally go towards the spot with more bullets so you can graze more, but if you cannot you find an easy spot to do little grazes. That generally translates to better player = more grazes = better score.
Another thing... with mods, the relax mode would change the controls from arrows to mouse, and there could be a mod called "Turbo" (subject to change), where you cannot use shift to focus like before. "No Video" could be replaced with "Simplistic", where all the bullets would be the same color, and many effects (like cut-ins) would be turned off.
Osu is going to turn into the best universal rhythm game compilation ever. EVER.