Yep, like i said above its not shockadin damage that is "through the roof", its only Holy shock that is.
20k hits with denouce are not overpowered on a 1,5s casting time spell on a class loaded with spelpower (and you cant heal while doing it), its 125k CRITS with an instant cast spell with a 6s CD is (holy shock)...
It seems clear to me that since its beta, blizz clearly overdone their buff on holy shock, it will be adjusted easily.