regarding OOM.. healers should not be going OOM with the mitigation I talked about on the last page. if you're putting the responsibility on the healers, they will certainly go OOM, tank dies, mobs run lose, everyone wipes.
We need to stop this mentality now. With one CC healers and smart playing (get out of damage, get your interrupts off, carry bandages, etc) at least 330+ should not be going oom. you might not be able to do chain pulls but mana should NOT be an issue. With multiple CCs mana shouldn't even be discussed as an issue and you can probably even grab an extra pull before needing to drink.
on bosses, 335+ healers should only be going OOM if people are being stupid. yeah I said 335+. 329-334 seems to be a tough range for healers with really great execution needed by everyone. but 335+ mana should not be an issue as long as people get out of the black/purple/fire spots and you are going after the mobs in the order/priority needed.
I strongly disagree that the healers have the hardest job in heroics. They have an incredibly critical job, but I don't know how much more harder it is than me playing frogger with splashes on the floor while trying to keep adds sheeped and dealing out damage to the current skull icon. However I do agree with sweet talking them after only because when things fail in Cata heroics, it's usually the healers who are chewed out. Still, CC and coordination play a lot bigger part in a successful heroic than a 340+ geared healer who knows how to play his class perfectly, not that that isn't really nice to have.
edit - as for calling out cc targets... just agree on it before starting. I am comfortable at this point tagging all of my CCs, but if the tank/guide wants to do it more power to them. Either way I have to remind them to pull the pack away from my CC, lest my Living Bomb finale breaks my sheep.... god I hate that groups are still having to get used to playing with a fire mage....
damn you blizzard for making fire low man on the totem pole for the entire last expansion!!!!!!!