Considering the bars/dots don't really mean that much, specifically seeing if it's 4 bars or 5 bars or something like that isn't exactly useful anyway. Which is why the whole thing with the new dots kind of gives more space to something that is actually not that meaningful and more or less just completely moves away from an accepted industry standard of using bars for no real/good reason beyond just for the sake of change more or less.
Well the dots/bars mean the difference between facetiming someone or waiting until I'm in a better area. Or the difference between more hefty web use by tethering my iPad or not.... The dots are much easier to see than the bars.