Since the direction of this game is focused on Heavy Attacks are for restoring resources, and Light Attacks are for dealing damage, I think it would be worth having a look at this passive.
In the patch notes, it is mentioned in developer notes that they want the 2H to deal more light attack damage, and have the lightning staff deal more heavy attack damage. This is great in my opinion however this does not synergize well with Follow Up.
So I have a couple of ideas on how we can make this passive more appropriate.
1) Change it so after a heavy attack your damage is increased by 10% for 3/5 seconds.
2) Make it analogous to Hawk Eye: landing light/heavy attacks with your 2H increases your damage done (all attacks) by 1% for 3/4 seconds. Can stack up to 5 times.
Thoughts?