While the potency increases may seem small, you have to keep in mind you are spamming them constantly throughout the fight. Which means they are most certainly going to add up over the course of a fight. Not to mention, as Leidiriv says, we now have access to the perfect proc opener which means our opening burst is stronger and more consistent.

Personally all I felt RDM needed where potency boosts, so I'm more then happy with what they gave us.