I'm actually surprised (and more surprised I didn't noticed this before) that LW didn't format the attack lines in the same format as the Paizo stat blocks.
(Paizo's version)
Melee:
+1 flaming greatsword +21/+16/+11/+6 (3d6+8 plus 1d6 fire)
(LW's version)
+1 flaming greatsword
Main hand: +21/+16/+11/+6, 3d6+8 plus 1d6 fire
So, with this in mind, I do agree with you the commas make it harder to read.
One idea I had when there's different damages is to separate out the attack values of each attack:
+1 flaming greatsword
2-Hands: +20, 3d6+7 plus 1d6 fire
(add space to align with above) +15/+10/+5, 3d6+10 plus 1d6 fire
But I don't know if that is programmable, nor would work within the format limits of HL on the computer and iPad.
I'll give this some more thought, though really appreciate the work you've done so far. Even if published like it is, it's a much improvement over how it is right now (enabling and disabling the checkbox with each attack so it calculates correctly).
Overhand Chop - leave checkbox enabled
Backswing - leave checkbox disabled on 1st attack, enable on subsequent attacks
P.S. Glad you liked my "[x3]" idea.