Using the mouse for edge-scrolling is kind of old and inefficient. I also play in a a window, but turning off edge-scrolling and only using WASD actually is actually better for me as i can move the mouse to any other application (which happens often) without having to AltTab while at the same time control the game-camera faster than when i only used the mouse. I don't remember if i changed it myself before or if Rebellion added this by default, but WASD works like the arrow keys for me. You consider this a problem? Well then here's a tip for you that not only solves it for you but that makes you more productive in the game:
