Combined Arms has tons of issues, but the idea is great IMHO. I absolutely love the idea of air and ground operations together, in a study sim like DCS. It has indeed this potential, but CA needs to be improved dramatically. As well as the engine, net code, stability, performance and all that.
Go to any big MP server with CA, controlling vehicles (moving from point A to B) causes significant FPS issues on these servers, that's why most of them have this prohibited.
So in order to make use of this potential you need to improve these things first, as well as the AI.