I disagree - they fundamentally can't make it a massive damage increase or it will unbalance all sorts of content. By its design (always on, maximum initial power) it can't be viable. I'm surprised they implemented it. Imagine taking any other healer if Disc can deal 20% or more bonus damage on Tyrannical week bosses when the group isn't taking aoe damage. Imagine taking this over Contrition if it's anything less. /shrug.