I´ve found that some are usefull early for cash and conscripts, and some are usefull for regaining lost loyalty after, but as the war goes on I tend to use them less and less
The military ones are fun to simulate a kind of massive uprising, as the Union you can mount quite a riot in eastern Tennesse if you go all in with unionist and partisans, the same for the Confederacy in Kentucky, I´m not sure it is actually worth it, but you can have a little guerilla war and hold a few cities, the AI should put more of an effort retaking regions in the rear front from small irregular forces, it looks as it doesn´t know what to do about it and it doesn´t feel real to be able to hold half a state with a few irregulars for two years
