I gather from the post that your team's not really created yet, or not many levels high yet. If so, I'd like to say that you don't HAVE to have a dedicated healer in your group if you use all hybrids. For example, if you used a pally and 4 shammies, or druids, or priests you could just have them all cast a minor heal on the tank with 1 key and its a lot more healing than having a dedicated healer. Of course the healing isn't as mana effecient, but I found that once I had decent gear on my pally it wasn't a problem.

On crowd control, I honestly don't know that its needed, I got by with my pally, druid (my main raid char) and 3 shammies. I used hex a bit but found that the pally consecrate and other abilities grabbed aggro, and if a ranged mob did drop onto another char I just taunt it back.

If you do want to use sheeping, get Jamba, it allows you to setup from your main the targets for each char to sheep, root, hex, whatever. Also it solves some of your quest management, but there is no escape for flipping between windows when the loot you want differs char to char.