Imo we have way bigger problems then a 4 manna 4/4taunt divine shild. Like a 0 mana 12+ charge and sycic scream dinosaurus and a turn 7 priest OTK or the tree that cannot be cut paladin.
Man i would love to play a HS where flutter wing is the biggest problem we have.
Also i never felt it being OP. But thats just me.