I read an article many years ago on programing Othello. I think it was BYTE Magazine, circa early 1980s. It mentioned pitting an app using a simple heuristic technique similar to the one you describe against an app using an equally simple (but devastatingly horrible) "flip the most squares" approach.
The heuristic algorithm won by a landslide -- 60 to 4 or worse (I don't remember exactly).