So basically anything that actually make one job somewhat useful and benefits the player to have a little bit of edge over the NM is considered game breaking.... What they have been smoking over there? It seems that their only idea is to make the NM has tons of HP and annoying AOE moves that kill everyone in range. No strategy here other than proc and temp items, and stun timing. They need to come up with a better alternative and if they decide to "tweak" existing content, which is a cheaper solution, just make the rewards better. Tons of older contents could use smaller boost and tweaking in terms of rewards given.