Seems like we have a pattern here...
This is one reason why...
Frostbolt now deals 52% more damage, but its debuff no longer increases subsequent Frostbolt damage.
Huge buff imo... 24% was a decent increase, but 52%? Hot dayum.
And this is the reason why arcane is not going to be better or even equivalent to frost... (barrage rotation was fine prior to this nerf)
Arcane Blast's damage has been reduced by 22.2% and mana cost has been increased to 1.66667% of base mana (was 1.5%).
Arcane Missiles's damage has been reduced by 22.2%.
Arcane Barrage's damage has been reduced by 13.6%.
Fire might actually be better overall tbh. With the scorch change, but frost just seems to win out. I usually don't go off of Noxxic when it comes to Mage dps, but Fire hasn't been given any significant buffs to make it better than frost and actually got nerfed again (with glyph of inferno blast) while frost only got one small nerf coupled with multiple buffs.
As is known... none of these changes are permanent until the patch date (and even then hotfixes can happen afterwards as we know quite well).