They changed Excess Fire from a 100% change to grant Brain Freeze to just a 50% chance. This has really made the spec feel noticeably worse. The whole idea of it is that it flows into Excess Frost, which is activated by consuming Excess Fire. Excess Frost is then used by casting a Flurry. But with it now only being a 50% chance to get that Brain Freeze proc you regularly find yourself with no Flurry to use. It just messes up the flow completely.
I have sung the praises of frostfire since the expansion launched, especially the frost version. Gladly proclaiming it the gold standard for hero talent trees. The changes they’d made to it previously only continued to improve it. This is the first time they’ve changed it for the worse. It is just a baffling decision and I am extremely disappointed. Please change it back, blizz!