When it comes to KLM and AMS it is essentially a Sky Team route and if you look at other airports in the UK they go up against not only the ME3 but other hub airlines and seem do fine a those airports. If you take Newcastle as an example they are not only up against Emirates daily 777 but the BA LHR shuttle and Aer Lingus and even there own partners Air France yet they regulary use 737 aircraft on most of the frequencies. The airport growing with people in Wales fly more from Cardiff then that can only benefit them in the long run.