Actually.... casters lost some of their power when the cap was raised to 16. They were the absolute Gods of Mod 4 and 5 (especially after the Mod 5 metamagic changes).
And I would say you can make plenty of reasonable assumptions of the balance of power after a month of new content. Already you can see that melees are handy to have. Casters aren't even all that useful in Shroud... apart from casting dancing sphere and cloudkill with the occasional solid fog.
But I look back to one Crucible run I did. Was in a PUG with a party of 6. Crucible on elite. My sorc actually got every single kill in the quest. It was kinda fun.
Granted the party helped me out by actuallly staying in one group and not getting lost... but still.