Okay, so a little introduction: As a full-time Holy Priest that was geared around "enough" Spell Power, getting more and more didn't really increase my effective output, whereas swapping to full Haste did (while the buff kept me at the same output, and now even more, hooray net gain). Restoration Shaman probably feel the same way about haste now, if they weren't already.
But.
I'm asking this here from a damage point of view, and asking the Enhancement community because you guys are notorious for your ability to sim everything. Has the buff actually shifted what you go for? Or is it a moot point either way?