The circuits flown at MB are huge!
Really?
They are only as big as you make them. I'm known for flying a tight circuit and I fly them fast and usually go inside those that light to turn downwind over the water. It's been working for me for 10 years.... but I'm not in a training environment. I'm not sure why large circuits are an issue for those that aren't actually training, because you rarely would even do a circuit except for departure and some arrivals and you usually set your own circuit size in those scenarios, particularly if you are climbing out on departure.