Yeah, I think the others have the right idea. Seeing blue-quality gems would really not please me, but it wouldn't be an instant reject. Having blues would. It's the highest level raid so anyone without 219 minimum in every slot wouldn't be welcome in my raid. Other than that though, you're pretty much there. You'll get turned down by some groups, but you will have the ability to heal the first 3 bosses when you do find a group.
The other thing I notice is that you're crazy about getting the slot item bonuses. Remember, slot item bonuses are just there to trick bad or unknowledgeable players. I'm not sure what the cutoff point for trees is. I know for boomkins it's any purple slot where the bonus is +7SP or higher, you can use the Purified Dreadtone with is +SP/Spirit(purple). This is because the amount of SP we gain from the +SPI and bonus is equal to the amount if we neglected the set bonus. Luckily, trees have need for all 3 major colors (Spirit-blue, Haste-yellow, SP-red), so getting the socket bonuses may be more achieveable without sacrifice, but it's highly dependant on what the bonus is.
While you're regemming with epics, consider this. It's been a while since I've really got into healing, and with 3.3 I'm not certain about gemming choices, so maybe somebody else can be more helpful. I'm pretty certain that straight INT(helm) is a bad choice though. Also, I think that since 3.3, haste has become much more important, possibly moreso than SP. So you may consider getting the 20 haste gems(yellow) for yellow slots and the SP/Haste(orange) For red slots. This will allow you to keep slot bonuses while utilizing correct gems.