Not sure how these can be remapped. But I felt the same using my lights connected to Zwave dimmer pucks.
I made 2 new scenarios DIM+ and DIM- for those lights that I felt needed more precise dimming. then as an action to these buttons I just wrote +8 and -8.
Then again I don't have that many lights that I feel is needed to control other than basically the Livingroom Cinema lights, kitchen and hallway. So I guess if many lights in one room needs dimming then it is going to be messy with alot of buttons.
duct tape.. but well, it helped me