Being a decent spec IS different of being op as its now, with these changes affliction is on Shadow priest level of opness.
If affliction stay as its, every fucking warlock will be forced to roll affliction to raid. And as you know, this expansion is ASS to ~reroll~ because legendaries and artifact weapon.
While they buff affliction to the sky, demo gets more and more nerfed without a fucking reason and destruction getting irrelevant ~tweaks~.