Swapping Chalkis for Thessalonica

[Mithridates VI Eupator]

I think it is right to keep Chalkis. It is an interesting province, gamplay-wise, and it was one of the three important Macedonian strongholds in Hellas. And as the other two, Demetrias and Akrokorinth are in, removing Chalkis would make no sense. Althogh representing Thessalonica with a perma-fort would be rather nice, I think.
If you should remove a province, I think that the province in the baltic called "Auvajgotanoz", or something, representing the island of Gotland, would be a better candidate.
But then again, that's not up to me to decide...

(It's a funny province, though)