OK, I'll add it to the Wishlist. But here's what I did that helped me a lot.
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Played around with various keys and found something helpful.

1) The right and let arrow keys will move to the next 1/16 note position. I have a utility that I can program to generate a string of keystrokes from one keystroke. So, I'll program it to send 4 "right arrow characters" to skip to the next quarter note.

2) CTRL right or left arrow will move to the next actual note. So, if I create a special file with the same note at every quarter note (easy with Edit-Copy Special-From/To), I can skip to the next/previous quarter note. Then I can use the fretboard to "correct" the existing note to what I want.

Tried it for several measures, with left hand tapping the utility key to move the "note cursor" to the next quarter note and right hand clicking desired note on fretboard with mouse. Works great!