I don't use the tact map, instead I find myself clicking the squad portraits on the top right to jump to a specific unit or reinforce. Jumping to the retreat point (ambulance) to reinforce everything in the area is something I frequently do. Use F1-F4 hotkeys to build units is a lifesaver too. Brits get F4 for Forward Assembly and OKW get F2 for medic truck which is awesome. I wish I could bind my Ambu to F6 or something.
I have map scroll speed set to very high, something I brought over from when I played Starcraft 2. That way you don't have to move your mouse to the edges as much. For small map adjustments, I use MMB to readjust.
I use default hotkeys too since I'm used to T retreat and R to reinforce. Never got used to grid hotkeys in SC2. I used default hotkeys in Dawn of War 2 too.
I didn't know you could adjust edge scrolling speed! Nice. Here's an interesting thing to note: if you give a squad a control group, when you double press the number you will center your camera on them. Just something I thought you might not know.