The whole CoR thing is annoying anyway. When Luther proclaimed his theses, years passed, even a Reichstag in Worms was detained and then some princes decided to adopt reformation (without any religious zeal I should think so, but strait political interests, and they did'nt ask their people anyway). And even if Kärnten "decided" to flip because word from let's say Ruppin reached them, i doubt the Emporer just sat there and mourned: "Nothing we can do for the next 10 years there, they are zealous."
So you lost your precious CoR, but all the other catholic states got nothing here to protect themself against this blight! Too bad!