If you have an In-flight or Ground Emergency, how much of it would you shut down...?
There is enough pavement for 3 individual runways, (where 2 could still be used in an emergency).
Seems really easy for someone to land on the wrong side of the circle... (Brits drive on the wrong side)
Airfield inspections would be BRUTAL. ( my military career was airfield operations management, and no not sweeper driving).
I think it would take more air traffic controllers to keep up with all the extra access points, where parallel runways have access like ladder rungs.
Winter operations where aircraft land on ice, would be wild, anti skid and runway friction test on ice would have to be rewritten.
Tossing in a "round about" where no one has ever been on one....?
Airfield standardization is key, so every airport has the same markings, same lighting, same everything...
The "ring" of the berm banks would never work, as approach and departure ends are designed for short landings or overruns, plus everything is graded and grubbed for rocks/stumps to minimize airframe damage.
Arresting gear (tail hook cables) housings on the outer ring would be above surface or the "tape" from the reals would spool properly. (mil)
Plus the controllers could never have anyone "over their shoulder" as there would be traffic there too.
So... it's a nice thought, but that's why they have "cross wind" (bisecting) runways.
But that's just "my" opinion.