Another good suggestion, noted.
Thanks for feedback!
One more 
, that is probably outside of the scope of the current note-off tool, but anyway… I sometimes like to apply note-off-like gating to sample-based instruments that use volume envelopes in the instrument settings. These sounds however won’t be cut-off by a note off, they do respond to velocity values.
Could your tool please have an extra option to set 00 values in the volume column, instead of note-off? 
bumped
Would love a random option in this tool. Random note-off placement, in between notes, never overwriting existing note-events. Please make it happen ledger 
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Great tool. It would be very useful if the delay values of the notes were taken into account when determining the distance between the note and the subsequent note-off. Thereby it would be possible set the same note length for all notes in selections with different delay values. As it works now, the actual note length you get is:
Set Note Lenghts values (as set in the tool) minus eventual delay value of the notes.
It measures the distance from the line where a note is present, not the actual position of a note.
In some scenarios, the result seems a bit arbitrary.
If there was an option to take delay values into account, it would work this way:
C-4 60 (where 60 is a delay value)
---
would be changed to
C-4 60
OFF 60
when the tool is set to Row=1 (and no further delay).
Missed your post before Drop Shadow, but it seems like a good suggestion.
Not scripting much here at the moment, but should take a look at this sometime.