All ground based spells still have a fixed DC of 12. I expected this to be hotfixed, but not only was it not part of patch 1, it wasn't even in patch 2?! How on earth have they missed this bug that impacts such a vast amount of spells?
I have just created an account to reply here. Yes ! Spell dc is the most important thing for any caster. Control spells are the bread and butter of all spell casters, this issue is a real problem.