LFR just isn't the environment for progression. Half the raid drops after a wipe. 2-3 people flame their way to a stroke. It's not remotely pleasant.
There is a lesson they should have learned from Spine. You can't have raid-wiping stuff trigger off the actions of one person (ok, one non-tank) in LFR. Forget the lesser endowed for a moment - a just consider the griefing opportunties.
I haven't done it yet. I'm hoping Vongimi is right and the purple circle hits like wet kleenex. If that's not true then it needs to be toned down.