1-Button rotation DPS!!! Macro of course right?
Seriously though, I do like the change as it means less clutter on my bars and most of the spells seem very situational at best.
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Blastwave seemed ok in beta testing for soloing stuff. Helps out a bit in Nagrand when trying to Fire mage solo those elite mobs for the lv 3 barn (gotta get that savage blood yo!).
Granted it's no comparison to Supernova with Prismatic Crystal for Arcane mages.