Yes, I do agree that with your points. However, there must be at least one airline out there that is at least interested, surely ?
Personally, I would like to see Monarch but that is just a personal preference.
Also, I think that the terminal itself could be improved as there are no viewing areas for PAX etc, although there was one but was closed down. Also, the departure lounge is incredibly claustrophobic due to once again the lack of windows. Renovation, and Customer Satisfaction are key here.
If CWL cannot be resolved, the future of Welsh Aviation lies at Pembrey. I have seen the plans for the proposed terminal and they look modern and amazing. Also, the runway has a potential size of 4000m due to the area, although it is currently only around 800m or so.