Uhm, no didn´t read any patchnotes regarding IV glyph. Do u have any link for me? We´re "progressing" (not enough players atm, realm is dying) blade lord ta`yak heroic and sha of fear, and till blade lord (at the first unseen strike, I realized its time to switch spec) I played frost only with stacking as much haste as I can get. Everytime I reforged to crit, my DPS dropped.
*Edit*
Mages
Fixed an issue with Glyph of Icy Veins that could prevent all three bolts from firing.
Fixed an issue with Glyph of Icy Veins that could prevent the affected abilities from doing the correct damage.
Hm, but that is not very specific, isn´t it? I didn´t recognized any issue to be honest