I lead a raid of 12 players (53-68th levels) into PoM 2 nights ago specifically to hit the Grand Gardener. But when we reached the center of the maze we were in for a rude suprprise. The new Enchanter epic 2.0 mob "All Seeing Eye" (75th level) is not only in the dead-center of the maze (where the Gardener spawns) but is KOS! It aggroed us, and aside from the Necros feigning death, it was a total wipe.
How SoE expects anyone to ever pull the Gardener again with this new KOS mob in place is beyond me.