Bus stop consolidation is going on as we speak on the 21 Hayes line, where, arguably, there are more stops than are really necessary. Muni has apparently been reluctant to delve into the topic of consolidating stops to reduce wait time, reduce costs, and increase efficiency of bus lines because there are, of course, always going to be people ready to fight to keep their favorite bus stop exactly where it is.
But it is happening, and here is a picture. Maybe now you will be able to get from downtown to the Western Addition in less than a half hour. [Hat tip: SF Citizen]