If you use ISBoxer then you can just set your mapping up so whenever any toon hits ESDF it gets translated to WASD, thereby avoiding the need to remap anything in WoW.

Using ISBoxer, I am attempting to keep all of WoW as default as possible. The only exception I've ran into, so far, is that I need to bind 'interact with target' to a key since the default does not have a key binding.