it would be great, to have the opportunity to draw volume curves (for e.g. snare roll etc.) when creating drum grooves in the bottom line of the pattern editor. Now it is not possible as far as i see, to draw a volume curve for a snare roll when the snare lane is empty.
Also for Pitch, Pan and Filter...
Atlas 2 from Algonaut, Drumcomputer from Sugarbytes and a few others have this feature. It is very inspiring.