It's not like the "Michigan Left" (I hate that name, "Metro Detroit Left" would be much more accurate) does away with making a left turn at a light. Instead, you make a right turn at light at the intersection, and then a left turn at the extra stoplight they added for the Michigan left. The only time it's really a win is when there's no traffic on the road you're crossing, so you can turn right on red and then left on red. And of course, in that case it would be easy to turn left on green if it were a normal intersection...