...they are all taught upwind climbing turns and racetrack military circuits with a constant turn from downwind to finals.
Definately reads like more fun, but what is the real world advantage of ovals at civ airfields? Blackbushe often has 6 or more in the circuit, often a mixture of fast and slow. That lot compacted into a dense oval shape should a nightmare, there'd more go-arounds than you could shake a stick at.