I thought I would put this out there for some who might have this issue. I have focal dystonia in my left hand, so I use a controller (Logitech F710) to move around the world. I use the D-Pad for WSAD, holding it in my left hand, and using the Numpad on my keyboard for abilities and mouse for aiming.
I've been doing this for over 17 years, and it works for a lot of games. I can play PvP, Operations, and PVE content with not too much of an issue.