My main problem is not really the lack of fluidity really, it's the fact that the provinces look, well, they basically look like something that could have been drawn up by the american government (straight lines, no exclaves), which you won't see happen with pre-modern states, there's a slight tendency to try, but even today there's leftovers from these eras. There was also the issue of the size of the province: how do you get a smaller domain, then. How do you represent the smaller states of the period?