#11 - April 29, 2014, 8:30 p.m.
15 seconds to top someone off is a bit long of an estimate, unless you're purposefully choosing to use weaker heals in an effort to conserve mana. Our goal is that you can still top someone off in a hurry if you choose to do so, but it'll be expensive. Skilled healers will recognize when they need to spend that extra mana, or when it's okay to leave their teammate hovering around 50% or so and just sustain.
Burst windows will still be a thing. Creating opportunities via CC will still be a thing. Those are all important parts of Arena gameplay, we're just trying to get away from "if I don't keep the Shaman at 100% he might die."