All these people talking about how it's going "back to classic"... WRONG.
Classic damn well had +Spell Damage, +Healing, +Attack Power, et cetera.
It just wasn't prevalent until you got into tier gear.
Dungeon 1/Tier 0 didn't have anything but base stats (except for set bonuses) until they updated them. Tier 1, and tier 1 equivalent loot, started showing these all important stats.
The only way this makes it "like classic" is leveling gear. When I leveled my first mage back in classic, I stacked as much "of the Eagle" gear as I could because stats were everything. INT/STA. No need for anything else. At least not until 60 and raiding. And that was bland as hell. This change, just given how it was proposed, is going to be equally as bland.
Do I agree that secondary equip stats were getting unruly? Yes, to a point. But spell damage/healing (now spellpower) has been around since the days of freakin' Molten Core. Why roll it into Intellect now? And if they're rolling spellpower into intellect, which is also a mage's primary crit stat, what's going to become the crit stat? Are they going to modify Molten Armor accordingly or are they still going to insist we stack spirit for extra crit even though they're basically laying out spirit as a sole stat for regen?
And this will open a whole new level of annoying theorycrafting because you know there won't be parity between int and spellpower. Given current item budgets, if they doubled int on a ilevel 232 chest piece but removed spellpower, there would have to be a 2-to-1 or 3-to-1 ratio between spellpower and int. At least with the spellpower equip you knew exactly what you were getting.
Alas, I digress. There's way too many questions for me to draw complete judgement on this new direction but as it was proposed currently I'm not really digging it. Maybe future clarification will change my mind.