GamePatchNote Digest
Volt Patch Notes — January 15, 2016
Aggregated from Steam, cross-tracked with Battle.net coverage on GamePatchNote.
So it might happen after all.
After controls scheme update it became easier to implement it. This probably won't change the game's playability or the gameplay but you will have a choice between mouse and gamepad.
I don't want to promise any exact dates or anything but Q1 is possible.