OK. After playing just now, I realized that although I was not so concerned about WASD controls, I am now a total advocate.
The mouse point and click/hold system of movement is driving me nuts. I am constantly accidentally clicking on things like ladders or enemies or SOMETHING else, and it is causing me to go places I don't want to go. I can't zoom in a lot of the time because if I do my cursor clicks on the wrong things, makes my characters go in wrong directions. The more objects around you, the more the mouse point/click/hold feature just doesn't work well. If you let us have WASD to use for basic movement and then allow us to use edge panning for camera turning, or a standard hold right mouse button and move mouse to move camera around, that would make our lives so much easier.
And half the time, by the way, I have to zoom out just to see where I'm going because I can't tilt the camera up enough to see up a road or something. Give us camera tilt too so we can actually see from zoomed in mode where we are going and what we are doing. There are so many raised surfaces. We really need to be able to look up.
A simple UI toggle could do the trick. Toggle between WASD and mouse control. That way, if you want to move the camera around with WASD to view the map more, you can do so. Then, when you want to move your character, you flip the toggle back to Drive Mode, or whatever.