The OP said frost mages are OP to the point of boredom. Well if something can beat them, then they're not that OP are they?
I don't think he's talking duels. We run around in BGs and get 40-50 KB's with 0 deaths and its so ZZZZ. Frost used to have great survivability and 1vX ability, but you had to wear targets down a bit more. Now you global people in 1 or 2 shatters, and only really need to use DF on people with a lot of hp/resil.
That said, we should remember that we're balanced around 85 right now and not 80. Once we get to play in arena again we'll see where we stand, because honestly BG's are a joke and mages will probably always be OP in them because our mobility, damage output and survivability is so insane. We are trading r1 fb, winters chill and fast polys for higher burst. Whether or not it's a good thing or a bad thing remains to be seen.