The 15% of max hp spell interruption change discussion

[Aviars]

I'm still learning to PvP as a WAR, but what im hearing with this "15% damage interrupt" is : "Now you need ALL the team´s damage focused on the healers if you want a chance to interrupt it on the span of his cast ON TOP of his/her mitigation shield".

No, it means the ability you use has to deal damage equal to 15% of the persons health. Which means warriors can't spam tomahawks while snared to interrupt you