After reading that from a blue post I was shocked, because I cannot disagree more and I don't understand the logical reason behind this.
I've tested myself in both raid bosses (garajal normal) and in the city with some timers and so to not cast pyroblast in less than 3sec, to simulate the cd, and I've around 15-20% less dps which confirm what was obvious for me at first. Maybe now fire mages should ignore crit and go full haste, otherwise I don't understand anything
ps: pvp always fucking around