"seem to be headed towards yet more London-centric investment"
That depends on how a country is "configured". Britain and France, for example, have everything mostly concentrated nearby London and Paris.
Others, like Germany, have more "top" cities and highly populated areas (Frankfurt, Munich, Berlin), Spain has Madrid and Barcelona, Italy Rome and Milan (plus highly touristic destinations like Venice or Florence), the US several ones.
Whenever I fly I try to minimize stops. Whatever airline offers me a point-to-point flight is welcome.