Another idea would be to use say, 3 runways offset by 60 degrees, ensuring that at worst, the crosswind would be at worst 30 degrees off the nose ... I doubt it has been tried though
For modern large passenger planes, and with runways aligned with the prevailing wind, and with competent crews, crosswind components are usually within limits. There are of course notable exceptions, and some airports could definitely use some runway options, but for busy international airports, with significant pressure on groundspace availability, the minor inconvenience of a little crosswind does not justify the operational problems of a circular runway ... I'd love to see how he plans to get 3 of those into use at LHR for example ...