I think a system based on strategy targets zones would be better. The zones would have to be reworked but....
Think of the game going this way. After a map reset, no bases are captureable...
1. Buff missions are needed to kill strat targets in a zone.
2. The more strat zones you kill, the more bases open up for capture... Where and the number of bases open for capture is back in the players hands and not following a "Blue line" .
3. If the strategy targets rebuilted the bases becomes uncaptureable again, so the bomber have to keep hitting them.
4. The HQ mission become useful again to drop the dar so the other side can't see the buff missions.
5. Trains, convoys, or barges becomes good targets to go hunt for to keep them from attempting to resupply zone strat targets.
6. The CV's are back in the game.
But most of all where we fight is back under the control of the players.
CAVALRY