the system we have now is not that bad. It makes it more realistic.
2 things that i don't like about it.
1) my capton faught it egypt and after getting promoted he travels to rome in 6 month. And then it takes him 3 years to get back.
2) my governor spend 40 years leaving in his city, he had a family, and all of his offspring live in Rome? It would be nice to have children apear in the same city as their father.

however, this system does allow for you to gain an advantage. Build up acadamies in your capital. and you will have better governors