My mouse is set up to zoom several lines of text with each notch of the wheel. That works fine in most apps and I'd like to just leave it at that setting. It works pretty well in Ashes except sometimes when I want a precise zoom level and can't get it.
So I suggest assigning the keypad +/- keys, or maybe page up / down, to zoom by single Ashes-interface increments. Then I can use these as a tweak.