If I were you guys, I'd definitely remove the Papacy. It bears no significance militarily. Only of course religiously and politically. Since Total War is primarily a military representation, I believe it should be the aim to go for what is militarily important. Instead, it should be a rebel province and a major control point. If someone invades Rome, then nearly all Catholic factions should declare war on that faction and owning it should have major advantages as well as major disadvantages.
I should also argue that Syria, although an immensely important region economically and militarily, was not an independent state in technical terms. It was throughout most of this time period occupied by distant Islamic regimes that were not situated in Syria itself. Just before the time of the mod, the Fatimids seized Syria from the Hamdanid dynasty. Also, the later Ayyubid dynasty also controlled Syria from Cairo.




















