I find it funny that people that never do any pvp event (OldTrees & Chapuz) are somehow the experts at card balance? Play in some tourneys and PvP Events, then maybe you'll have a balanced opinion of the cards in this game.
For the record, Dim Shield is unbalanced and takes away from the game.
Most games are only decided by a turn or 2, so what happens if you stop your opponents damage entirely for 3 turns?