They were suppose to be getting rid of spell upgrades for the line of spells that are based off of %'s. There is absolutely no reason for them to upgrade this line if they are just making it exactly the same but cost more power. The thing about the Revulsion line is that there isn't a single upgrade to this line that does anything different but add more power to cast. Master 1 Revulsion will lower attributes by 32%, the exact same amount as Master 1 Abhorrence, but has half the power cost as Abhorrence. They just added a new lvl 7 defiler spell on that line called Repulsion that costs only 13 power. Can't say for certain, but I'd guess that it too debuffs the exact same %'s as all the other spells in it's line. I just dont see a point in them continueing on with this spell line.