From what I can tell from FM PVP in my time playing it, and as someone who's reached the 6-10 and even top 5 brackets (and not at beginning of season), I can say with full certainty that FM is absolute garbage now.
Good luck actually getting that 100-0 wall combo off, let alone mastering it (unless your name is Forsynthia, Darken, Taylord, or Antrax). The counter intuitive nature of the new build is going to render it impossible for most players to ever get that full combo off, let alone survive long enough to get it with all the buffs that broken classes such as BM (yes, I will never drop my belief that BM is broken, especially now) have received this patch.
Give us back our air combo, remove the cast time from Frost Tornado, and move Frost Burst, and Tornado from fire stance, to ice, and move Heatwave and the Ice Ring from Ice stance to Fire.
This way, the abilities used in the 100-0 wallbang are all in one stance, and the skills that people are used to being in Frost and Fire stance, are returned to their proper slots.