Agree, too much carafa, it's going to be too dark.
I hear a lot of people say they like all Dark Munich in their beers and the mroe and more I play around with dark german styles the more I think you can have too much dark munich. A blend works the best. I always add about 10% pils, but that's just an option. For me, I find it makes the beer just a bit drier which I like.