Ability to collapse individual bezier point handles

Would like to be able to select a control handle for a vector point and with a command have, VN set the length of that handle to 0 so the line comes straight into the vector point. Takes much trial and error to do this manually.

If I understand correctly your question, if you double tap (iPad) on one handle it will change the point to a single handled point. Double tap on the main point to remove handles double tap again to add handles. Double tap but hold the second tap to move both handles simultaneously.
Hope that helps!