Add ability to delete rows (remove notes).
Add ability to play note values in via a keyboard.
Complete overhaul.
There are too many features to list.
Drums are important to music. Should be a priority.
I am a robot. Talking like a robot right now. Not sure why. 
Well they updated some things in it (Cubase 8.5). The filter button can hide notes not being used in the instrument. Nice.
+1
Oh yes, that would be so great!
I would also like to be able to display the piano roll alongside.
And an option to set not length to follow the quantize value!