I've long been an enthusiast for New England style rotaries, but in their current Midwestern form as roundabouts, they're overthought. Do I have to make everybody stay after class and write out, repeatedly, the following two sentences.
1. The point of traffic taming is to lessen complexity.
2. The temptation of traffic engineers, however, is to provide complexity and call it intelligent design.
Thus, the roundabouts that are showing up in more thickly settled, and sometimes, walkable, neighborhoods, are becoming as dangerous to pedestrians as are the signalled crossings, with or without walk lights, walk lights with or without beg buttons. There might be room for improvement, such as turning the center of the rotary into some sort of public space.