I'm not sure I understand the underlying problem being that most tools are too mouse intensive, for me, the issue is that there are shortcomings that make it so

I'm not sure I understand the underlying problem being that most tools are too mouse intensive, for me, the issue is that there are shortcomings that make it so that you need to use the mouse a lot and which don't need to be solved with a keyboard. For example, if the tools could shift stuff around so that boxes don't overlap, I won't need to spend ages shifting stuff; if when I link one box to another with an arrow, it doesn't weirdly snap to different places on the box, then I wouldn't need to fiddle with it to try and separate/combine lines; If I could set the mode to curved connections (mindmap style) or square (all lines are angled by 90 degrees) then it would lay things out well. It might suit a different use-case than what I think of as a flow chart though so hope it helps people.