Plus, some places make a rotary out of a 5-way intersection which can be incredibly confusing.
I've been driving the UK for about 20 years, most of which has been urban driving. In the UK we have lots and lots of these roundabout things. Some small (perhaps 20 feet wide) in cities and towns, some very big. They are all trivially easy to navigate, and make driving far less stressful than stopping and starting at traffic lights the whole time. You just give way to those already on the roundabout (if you are approaching it) and watch the danger on your right when you are at one (or on the left if you are in the States). I have never seen a significant roundabout accident in the UK, mainly because it's pretty much impossible to go into one at any speed unless you have a clear deathwish or a hunger to see how your suspension handles the rather large bit in the middle.
I also fail to see how the number of tributary roads make them any more confusing. I've been on roundabouts with about 10 roads coming in to them. You just keep driving until you see the sign you want, you then look in your MIRROR, you SIGNAL, and then MANOEUVRE off the roundabout while looking about. If you don't see the sign, you just keep driving and go around again (while your partners reads the map). So you can take you time to make up your mind, unlike on a large crossing.
Of course, if you are going too fast, or just don't know how to drive, you will have problems. But then, you deserve everything you get in that case.