Sir John
Oh God yes! Please do so.
Chieftess has already come up with one proposal, but it has not yet been voted on. I imagine we'll be voting on these borders within the next week or so, so please submit any proposals you may have in mind.
Keep in mind, that provincial borders must adhere to the underlying terrain whenever possible (ie. borders should follow rivers, mountains, hills, etc), and not necessarily a cities cultural borders. Other than that, though, have fun, and on behalf of the Cartographic Office, thanks for your contribution.