Here's a trick for you:
After entering all or a bunch of notes, you can copy the velocities to a CC lane, and they'll be converted to CC messages with values matching the velocities. I use this trick with Garritan synths to get CC11 Expression values that match the velocities I played. Just select all the notes, right-click in the header of the CC lane, and choose Copy Selected Values to this Lane.
Regarding adjustment resolution, with many controls and settings holding Shift will give you fine control over adjustments; unfortunately it doesn't work with controller handles.