According to: https://www.altered-time.com/forum/v...php?f=3&t=4249
Arcane has on the PTR received buffs to almost all our main abilities, including Arcane Blast, Barrage, Explosion, and Missiles. Not indicative of what the final version of 7.2.5 will bring, but it gives some confirmation that they are at least toying with the number tuning of Arcane for the patch.
Whether it will be stronger than Frost remains to be seen. Frost of couse received that TV nerf, but they also got a number tuning buff to their main abilities.