Well any new route or increase in capacity would be welcome. You only have to look at the figures on TFS,FAO or DUB for example to see that CWL was running under capacity.
If FR do announce a couple of routes from CWL, I just hope that they operate new routes rather than competing on existing routes.
As much as I want CWL to develop into a great airport (spooterish side coming out there) business is business and I wouldn't want to see any airline pull out because they can't compete with the mighty FR and we become a one trick pony.