I see roundabouts as a mixed thing. For many car oriented places they are indeed a much better design. They can be made ok for pedestrians but especially without traffic lights (or on streets with very light or very slow traffic) they tend to be more dangerous as many car drivers exiting round abouts are appearing quite suddenly and are often too fast, even if there is a pedestrian crossing. Many round abouts don't have priorty for pedestrian to start with. Ireland had a lot of absolutely terrible roundabouts for pedestrians at least a decade ago. I don't know if it got any better. Lots of traffic, no priority for pedestrians, fairly high speeds. It always felt as if you had to run for your life when crossing the road there.