The point of traffic taming is to lessen complexity, not to give traffic engineers a chance to be too clever by half. Cleverness, when it's applied to rotaries, can be hazardous to pedestrian health. "In short, a roundabout can provide good, safe crossing opportunities for pedestrians, but only if engineers have pedestrians and bicyclists in mind when they design the roundabout, and only if drivers use them properly." The article focuses on getting pedestrians across the streets that connect at the rotary. It may be too much to ask that there be a way to walk to the center of it, in case a monument or gazebo is there.