That's what I'm telling you... it's not just newcomers and about you. A 27k IL team is experienced players and they couldn't do a RTQ. The game is broken.
Dude I watched a 27k alliance team get wrecked in a RTQ. Many melee classes lack their own mobility to survive red zones of bosses to kite effectively. The healing and AOE healing is really needed to some degree. To nerf it to dirt destroyed their game, and many people I know quit the game until they realize it and fix it.
Basically you reduced outgoing and incoming healing to 50% of what it previously was since balancing the game is an issue from pet buffs not being taken into account on IL. Now even if people geared out with IL 27k will get downed easily, however, I don't think you stopped to think about the other 99% of your player base…