Frostheim's work to compare DPS specs in raid content has always interested me, and for a while, I've been toying with the idea of doing a healers' version. However, healing's always been a lot tougher to analyze from meters than DPS. The whole point of DPS is to do as much as you can, but healing is more about doing as much as you can as efficiently and intelligently as you can. There's no point to topping the meters one minute into the fight if you're running OOM doing so. And then there's the minor point that it takes a lot of experience to parse healing meters accurately. I imagine most discipline priests have at least one horror story about a PUG raid leader trying to kick them for "low healing." Nevertheless, we shall do the best we can.
Frostheim uses Raidbots, which in turn pulls its data from World of Logs. World of Logs I was already familiar with, as my guild has used it to upload data after its raid nights, but I'm still new to Raidbots. For both that reason and my comparative inexperience trying to use these tools to generalize about a huge player population, I'll be blunt: This is going to be a much more tentative outing than you'd get from Frostheim. While acknowledging these limitations, I wanted to take at least a quick peek at how healers are faring in Dragon Soul less than two months into patch 4.3, with the promise that we'll revisit this topic in a few months with a much more in-depth look.
Fortunately for me, some trends are so obvious that even I can't screw them up.