I suspect it's not better than straight SP but it may be. Procs very generally are weaker than steady damage and particularly dial-damage-on-demand (on use verse proc trinkets, execute range, etc.) Dial wins because you can hit hardest when you NEED to blow stuff up and can sync them with boosts like hero/blood.

It is a cool change though, however it pans out. More options good.

From post, "Especially Arcane Mages, for whom haste is valued higher than it is for the other specs." For masochists doing raid frost/torment, haste in decent gear (25 Naxx+) is equivalent to SP. Only way to gear frost raid and stay joke instead of "is she even here?"

According to the EJ 3.3 mage thread:

Enchant Weapon - Black Magic changed to 250 Haste Rating instead of a garbage DoT.
Warning! Beware of Haste Caps. 50% for Fire (Pyro/LB), 150% for Arcane (AB/MBAM).
Confirmed Data: 10s duration, 35s or less CD. Proc rate most likely 35%.

With that behaviour, you have at least 30% uptime. It beats 68 SP on one-handers easily and 68 SP on staves by a small margin.


http://elitistjerks.com/f75/t30655-wotlk_complete_mage_compendium_3_3_ptr/

So speaks elitist jerks and so it is written :P