Some examples of high end CRs would be better...
My experience with Tuanha seems to be getting worse. I used his Resto Sham CR all of MoP, mostly Arena. I was able to get up to 2200 in 2s and 3s, seemed to have peaked. 2200 is good enough for me. In raiding, I was almost always top healing, even in Heroics. Never had complaints raiders or arena partners.
However, now with WoD, I am lucky to keep up with ~1600 rated teams. His Healing CR's really took a turn for the worse. Don't even get me started on simple 5mans. I haven't really done raiding yet. My guess is that he just has way too many CR's now and is way over his head with all these class changes from MoP to WoD. He hardly seems to even reply to his threads anymore. Maybe the flaws are just more obvious since everyone is low geared again, and stats aren't like they were at end of MoP, but I have people asking me how I did so much better last season, compared to now.
If anyone can recommend a high end resto sham CR, please PM me, money isn't an issue.