From: Somewhere deep in appalachian valley in PA
+1 to WEGO style turn-based system.
One of the reasons is time compression for ASW and navy operations. Timescale and length scale of air ops, naval ops, and ground ops are different. Full real-time will create an issue of "when and who will decide the initiation of time compression". It is possible to introduce a voting system for time compression in a real-time system, but there is a chance of trolling players ruin any MP game experience. IGOUGO turn games are not perfect, since it can make first turn player too good (depending on the scenario) or can make a particular player too favorable depending on the situation.
So I think WEGO style system can be a good solution.
Also, it would be interesting to introduce a system of different command aspects based on faction, just like Flashpoint Campaigns. Such as the limit of the possible number of orders per turn, which can vary with the morale of the force, HQ unit's status, or other conditions. Or, different turn cycle of command turn and execute turn based on factions.