Before I get FA(F), I play a Star Wars game called Empire At War - Force Of Corruption(it expansion), and the game have a Galact Conquest, that is like a GW, but only for 2 players...
and there some Ideas that I would like to steal from that game...
Note* puting some of those Ideas in the GW can cause a bit o Imbalancing (1*- and 3*- are examples)
1*- Eco- like the Zero-K planet Wars Eco, but w/ uses like build units and buildings
of course 2 resource(Mass and Energy)
2*- Unlock Tree- not a Tech tree, but something like:
-I need to make a T-2 PGen to run my shield so I can't make the shield before the PGen, and I can't make the PGen w/out a T-2 eng so I need to make a T-2 Factory.(need 1*-)
is like what happens in a match but put in the GW level
3*- Front Lines Defences and Proxy Factories- in EaW, you could make TurboLaser Defences that are placed in some strategic positions, and bigger planets can hold more than smaller ones
EDIT* some of the buildings can be placed in the Main Base, like PGens
4*- Raids and Attacks- if chose raid one commander get on the planet, and he can do every thing like a attack would be able to make, but if he kill all enemy commanders he will not get influence to his faction, and the recall is cheaper
the Attack is the gameplay that happens now...
5*- Commander Housing- the commander get on a planet instead of being able to travel all the galaxy in one click, and he will not be able to reinforce areas that aren't connected to the planet that he is
6*- Rebellion- if two or more commanders of the same faction get in the same planet, they can rebell against theirs master, and if they won the battle they get a bit of influence of the planet and get free(need 5*-)
7*-Quantum NetWork- if the enemy take on a planet you can destroy the Quantum Gate of the system slowing the enemy, but of course w/ a cost, and the faction needing to have a percentage of influence (which is lost, and the commanders who are on the planet are taken to the next planet (see 5*-))
EDIT*
8*- Probes/Satelites reveal the map before the attack for the next N* Battles(Defender Player don't need those), also show if the enemy have Defence on the planet
Note* the Third suggestion is better for big / assymetricals, but can work on a Winter Duel if balanced