It would be nice if opacity can be separated when pressing e to switch between brush and eraser.
For example, I am on a brush with opacity 0.5, when I press e to switch to eraser, the opacity will automatically at 1 that gives clean erase, then when I hit e again to go back to brush the opacity will stay on 0.5, so I don't need to manually go to the slider to change opacity after switching.

Thanks