Im playing arcane, watching lots of videos where people play frost and my conclusion is simple: frost is much better than arcane, arcane have pretty much one burst - arcane surge + missiles and thats about it stupidly easy to interrupt, if thats gone youre screwed as other spells / combinations are doing considerably smaller damage ( + you need to count on curtesy of your enemy which will stand and just watch as you casting forever spells … )
Frost on other hand got so many buffs recently, have 2-3 not bad bursts, casting is much quicker than arcane…
Generally in pvp frost is now best i think, arcane need changes, not necessarily damage buff - I would see much more value in 1, maybe 2 additional skills which could do some decent damage ( ok, maybe not so big as arcane surge but still )
Arcane got an undeserved nerf on Siphon Storm, it took already 8-10 sec off uninterrupted casting before it could do anything.
The last 50% nerf prety much nuked the spec in PvP.
Mage overall feels outdated in PvP (not outclassed). The squishie class design doesn’t work anymore when classes like warriors have 6-7 mobility abilities they can pick at the same time and use back to back. The meta has been “train the mage” for 10+ years of arena. The mage might be slippery but hes not doing much damage either. You’re one of the original pure DPS classes but at best the class plays like a support that assist with CC and damage when you can. It’s not that fun playing second fiddle to Destro or Ele who just pump craze amounts of damage out all game even when trained