I've tanked this now 4 times in heroic. The first two times it went smoothly with no wipes and my guild was thinking of this as a pretty easy boss. I got aggro at start, turned him and even with one or two times being bounced in the air as long as I kept myself central I wasn't blown off. However the last two times have been a nightmare, enough that we ended up discussing last night if something had changed in the fight or if the fight was just down to luck. One nightmare we wiped about 10 times before getting the kill, what was strange was the kill seemed back to being fairly easy. The second nightmare we wiped again a lot of times and eventually gave up.
In terms of tactics I'm don't feel I have a strategy which is a consistent kill or which even gives much control but I can't see much alternative. First as a tank is establishing some aggro at start, I don't usually have trouble but it may be worth asking the dps to tone it down at the start. Second, I turn the boss as this does not seem to affect his breath going onto people. I stand as close to him as I can as close to the middle as I can so that turning him can mean moving very little. But this all depends on the whirlwinds and usually I end up moving about quite a lot to avoid them. The boss seems to be hard to get to move once he's landed and seems to just turn on the spot so I don't charge him but heroic throw, then taunt and try to drag him to the middle straight away. From then on it's just hoping for good ww positions. Dps are certainly taking a lot more damage than on early attempts lately, which I'm not sure if positioning is bad for them. I also have difficulty when the wind is blowing in seeing the ww's and positions. If anyone has a graphics setting or a camera position that helps then I don't have a good one. So this is what I do but it's certainly not perfect and isn't leading to a consistent kill.
We had one wipe when a ww spawned underneath me, then bounced me straight into one ww and then another and then outside so that I was one-shot. So there's definitely luck involved but if anyone has any improvements I could do with some as well.