It’s great to see frostfire getting specific adjustments, however frost will most likely need an aura buff to its kit in .5
These adjustments also don’t address the mastery scaling issue that frost has with frostfire, since a large part of what’s been buffed here in not on the mastery at all.
A base spec aura buff for .5 and addressing mastery concerns (just add those spells to mastery at this point) should put frost in a great spot for this patch