Velocity Levels in Drum Edit
You should be able to use alt-click and cmd-click to create different velocity levels in the Drum Edit mode in the same way you can when programming Redrum. Cubase has been able to do this since year dot, and it's more useful for accent-style drum programming than just being able to adjust the velocity curves manually. As it stands you may as well program drums in Key Edit mode, there's nothing that makes Drum Edit more suited to drums than Key Edit. Now I know why I always use Redrum to create patterns. Sort it out!