Please note, I don't think all the features I listed are desirable. (Pie menus for dragging gestures? Pretty hokey.) Ethersheet allows typing ranges in formula

Please note, I don't think all the features I listed are desirable. (Pie menus for dragging gestures? Pretty hokey.) Ethersheet allows typing ranges in formulas and that is possibly enough. Dragging to choose a range can be nice but it has to be implemented carefully. When to stop acquiring cells for the range and return focus to the formula editor? Some versions of Excel do this badly. For example, after dragging to enter a range you use arrow keys to balance parens. Excel thinks you are still selecting cells and inserts multiple ranges into your formula.