I don't see anything wrong with your set up. Looks pretty good to me and similar to what I have. I don't like the dodge trinket much and with Repelling Charge off Thaddius you could cover all your avoidance bases and drop some def gems/chants to stay above cap.
I am an admitted EH whore and will skew my gear that way even if it goes against conventional wisdom. I don't think its as clear cut as it once was but I think Ulduar progression is going to favor EH with enough threat to lock down mobs.
I personally will maintain my expertise and hit and try to improve my hp through Ulduar drops.
The World of Warcraft Armory
your hat may be nice, but I have the little white tank top that says Legendary right across my boobs. I win. (or more correctly, H wins)