I would love to see these kind of options implimented. They'd make some really interesting diplomatic options. I think the diplomacy aspect of TW games have been pretty weak so far. Rome added expanded the option greatly, but I think there's still plenty that could be done, such as these. Heck, just being able to make deals with the rebel groups would be a huge step up. Only thing is, they'd really need to improve the AI to make it capable of utilizing and preparing for such situations.