I was using macro healing until a few days ago.

I micromanage the tank and just let the 3dps go through macro rotations. Click healing has made it much easier to do instances. I end up using less mana. Its far more efficient and effective. Also, I have way less overhealing now. Probably good things to get used to since Cata instances are supposed to be so much more difficult on healer mana.

I've always played healers, too. A different approach, which can be seen in a paladin+4dk arena video on here, is to lead with your healer and just macro everyone else.

I lead with a druid healer on a team I'm leveling just because its something different to try. The tank is a DK in that group and they're pretty easy to macro - probably second to paladins.

Anyway, my suggestion is to either lead with the healer or move to click healing. You could also lead with the healer and use a click healing type setup to use your tank and/or dps to get stuff off your healer lead in emergencies. (intervene, that paladin taunt, some warrior shout, that one and only druid emergency taunt, etc. - i forget all the ability names since i lead with the tank and never use them).

Sorry for the rambling reply. I keep alt-tabbing to check on the WoW updater...