I recently for a new Logitech mouse with macros ('cause the Razor software for my keyboard blows) and have been using that. One button for W and one for E...so much better to be able to remove my hand from the keyboard once it a while.
I've lobbied for auto-run/cruise control in the years past and still believe it should be a thing. Really, given the long play sessions this game is built for, it's almost a health issue.
PM me to sign up for the carpal tunnel class action