I'm glad there is an interface for it now and it works pretty well... But there were some nice advantages to the old system.

Placing a note on the hotbar meant you really didn't need to remember the order the notes needed to be played in, you could just set them up in the correct sequence and go. Make a macro to copy the hotbars to an unused class and one to bring the hotbars back, and you were good to go.

Now, you've got to put quite a bit of practice in to play something impressive, and pressing shift to change octaves feels weird...

Side note:
Can anyone confirm if this works with a midi controller?