Its rough, as many of you will find out in the coming days. Many of the Heroics on this planet contain tight packed areas where AoE and CC attracts two waves which is just unbearable. I was with a group of lvl 32s (two levels higher than planet max level and 4 levels higher than the Heroic) and we still could not beat it because of the placement and difficulty of the mobs. This really needs to change, definitely when half of the missions on the planet are Heroics.
CC does not attract two waves, people standing in the wrong spot does. And obviously if you are using CC you don't AOE. Those heroics are fine. You need to get a better team that doesn't try to face roll stuff, because that's not what heroics are for. They require some thought, and that's how it should be. If you don't want to think about stuff, then just lvl with regular quests.