Lucky Angel,
I think you'll find R308R has a pretty good idea what he's talking about!
As far as the route network from BHX goes, with the exception of some charter destinations and BCN, all the airfields are Cat 3 Autoland capable. The A319 can get in where Embraers cannot.
BTW, 2-3 years remaining for the A319 at Brum is pretty accurate according to the management.