I think the lack of Avignon is good, because just one random revolt is enough for the Papal States to lose the province, as they cannot send troops there.
I think it had quite legitimate tradition from 1440s.
You can enlarge it a bit as in case of other smaller provinces (like Calais or various islands). But it's up to you.
btw, why you decided to omit Avignon?
Thanks, but did I state otherwise? The Austrian mortgages of the Wiener Neustadt treaty are not just one town as well but multiply territories of Sopron and Vas counties.The province for Calais is not just the town of Calais and it shouldn´t be. It´s the Calaisis
http://en.wikipedia.org/wiki/Pale_of_Calais
Burgenland didn't really had an official name, because it never was an official administrative zone only after 1921. The best name for it would be Őrvidék, the original Hungarian name. It was part of Hungary for hundreds of years, and the name Őrvidék was mostly used for it.