"Occasional bumper to bumper for a couple of miles" was enough to make you want to go with a car that doesn't have a clutch?
My question has nothing to do with your MPG concerns. I just know that I'm enthusiastic (to the point of being fanatical) about driving a car with a clutch (I wouldn't buy a car any other way). Since you came from a GTI, I would assume that you feel similarly. So I'm surprised that your heavy traffic situation was severe enough to make you select a car that doesn't allow you to row your own gears. But I guess you've said that you have another "fun" car to drive, so I guess that explains it.
My occasional bumper-to-bumper creeping until I get past a traffic accident is nowhere near annoying enough to make me give up my clutch.