I have to throw my support with Loaf about how provinces are formed. Granted, there are good ideas about the automatic formation, however, yes, controlling which cities are part of a province is something I'd prefer as well, for my own satisfaction. On that note, Sodasquad suggested the manual/automated choosing of cities in provinces be a togglable option. Maybe this is a good idea. If so, well, I'll choose manual every time, of course, but it might just work, don't you think? That shouldn't be too hard.
My own view on capturing provinces: when you capture a provincial capital, something more significant than simply capturing another city should take place. Same with capturing a national capital. Perhaps what could happen is similar to what Sodasquad said about it. When cities within a province are captured, they are simply that, captured, though as long as the provincial capital exists, they of course could try to rebel. (city flipping is something I want changed drastically, btw!) However, when a povincial capital is captured, you can either destroy the capital, or keep it. If it is kept, the cities originally from that province which you captured rejoin that province, and the cities from that province which you have not taken may become more likely to surrender, however, the province itself, with the original provincial capital, is likely to eventually rejoin its motherland in it's entirety. IF you burn the capital, the enemy province is destroyed, and the individual cities must fend for themselves. They won't surrender as easily, but it'll be a bit easier to keep them from rebelling against you, since their centralization point is gone. How does that sound?
My own view on capturing provinces: when you capture a provincial capital, something more significant than simply capturing another city should take place. Same with capturing a national capital. Perhaps what could happen is similar to what Sodasquad said about it. When cities within a province are captured, they are simply that, captured, though as long as the provincial capital exists, they of course could try to rebel. (city flipping is something I want changed drastically, btw!) However, when a povincial capital is captured, you can either destroy the capital, or keep it. If it is kept, the cities originally from that province which you captured rejoin that province, and the cities from that province which you have not taken may become more likely to surrender, however, the province itself, with the original provincial capital, is likely to eventually rejoin its motherland in it's entirety. IF you burn the capital, the enemy province is destroyed, and the individual cities must fend for themselves. They won't surrender as easily, but it'll be a bit easier to keep them from rebelling against you, since their centralization point is gone. How does that sound?