From a joke pre-wrath, to OP at the beginning of Wrath, to almost a joke again recently, following stealth nerf after stealth nerf, volley got a little stealth buff in the recent patch.
The AP coefficient of Volley has been increased from 0.0586 to 0.0837. Base points did not change. This probably did not make the patch notes. (Source)
Hopefully, this will balance it and make it competitive with other classes’ AOE. But seeing the note on MMO Champion got a little, ‘yeay!’ from me in any case :)