It 'easily' beats windsong in the regen department since windsong doesn't provide any... "it's better than nothing"; not a big compliment.
Windsong is so good for so many right now, and the difference between it and the (much) more expensive class/spec-specific counterparts is so small (if it exists at all for many specs), that windsong either needs a nerf, or all the other enchants need a significant buff.