Apart from the "unacceptable to Wales" bit (really? :rolleyes, Jerry is right - we are where we are and need to accept that. BRS is unrecognizable from what it was and (like LTN) shows that if you deliver what the market wants, that largely overcomes a constrained site and less than ideal location.
Wardair seems a strange example - they had an extensive network from many UK regional airports which doesn't exist now, so not just CWL.