The main problem with it is that there aren't all that many resistible elemental nukes at high-end raid tiers. It was still extraordinarily broken in the instances where it did work
So this has been changed from something that was VERY good but in a very limited number of circumstances into something that is very bad in the same number of limited circumstances.
Indeed by the time you can get volumes 3 and 4 the number of circumstances you will use it drops to zero.
Time for a re-think in my opinion.