[A really short introduction of your idea, like the subject field of an email!]
I have been loving RTS's for many years. there are several problems that every RTS seems to have.
1. Useless units. I don't need 50 different units that are difficult to organize and control when the best strategy is to rush with dozens of a single unit type.
2. No strategy required. (see 1). Also there is not enough depth to the game. If I had to keep my troops supplied it would be more realistic and more interesting. such as keeping a tanker in the air so that patrolling aircraft have a place to refuel instead of returning to base. Using ships to ferry troops and supplies. (Not having to conserve fuel makes transports unnecessary.)
3. To much micromanagement, the player needs to be able to group units into combat units that will cooperate with each other without player interaction and be given assignments that they will carry out autonomously. Also units should be able to request help and the player can either simply grant whatever the unit requests or do something else. (scout platoon taking fire requests helo casevac. the player could just click the grant button and the army does the rest or the player actually sends another platoon to rescue the scouts or gives the scout platoon control of the artillery platoon or takes control of the arty platoon himself and takes out the enemy.
4. Units need experience. In my mind unit persistence is very important. It is important to have a reason not to send wave after wave of riflemen to their deaths. getting a soldier to the battle is only have of the strategy how will you return him to his wife and kids. when can he retire with full benefits. if he dies just before he goes home that is a loss of morale. you have to weigh the benefits of loosing the man with his value as a soldier. furthermore, a great amount of challenge and strategy and fun can be had trying to rescue a valuable downed pilot or highly skilled infantry squad.
5. Strong continuity. EVE online (MMORPG) has the worst continuity of any game and i cant play it for that reason. (among others.)
All of these ideas will bring a great amount of replay-ability, strategy and fun to the players experience.
The size of the game would necessarily be very large. Many of these concepts might not be appealing to some people. Perhaps you could add options to suspend some concepts.
there are some games that do scratch the surface of what i mean: Full Spectrum Warrior, Sins of a solar empire, Homeworld 2, World in Conflict.