You know why EMFH and improved shadowmelt made a difference? Because WotF and Hardiness were nerfed pretty hard in Wrath. But there is some problems with implementing it in TBC.
If you just give Alliance it’s Wrath racials, the effect will be minimal.
If you nerf Horde racials on par with Wrath changes, there will be uproar, that this wasn’t the case in original TBC (because noone likes loosing free power).
I had suggestion how to even out racials without nerfing the Horde.