Well I was about to say you were wrong until I read your last sentence. I find MTW2 like CM very cumbersome. Not familiar with google earth so whatever works for you. Depends on your play style. Myself I'm not interested in seeing my own tank and the enemy. Just the enemy. Therefore a quick spin around of my POV without collateral movement is the most efficient. I think squad assault for a flawed game had the best mouse/camera control going after its last patch. I play alot of 3D RTS games and found the most efficient; tried, tested, and true is the method used in games that went platinum in sales. After-all, the hundreds of thousands of kids with A.D.D. that bought relic games like CoH and DoW can't be wrong.
Incidently I don't like Company of Heroes so bad example.