IMO the GvG feature is flawed from start, not as much as design, but as principle:
1) The fight is between guilds, but battles are done by players
2) All guilds from a world compete in a single map that is the same in time
So those flaws can not be solved just by improvements. Now we are in some state of equilibrium and the proposed improvements will just set another. Not much better that actual. Because of 1 the rate of participating players will not improve, because few players can do that (need rights, army, boosts). And because affects the guild too much, few decisions is made without consent of leaders... so a chain of weakness. Also few players get motivated by the rewards GvG give.
GE is a much more balanced and avoid pitfalls of 1&2.
So IMO there is nothing there to improve.
The point farming will actual be more enhanced than now using the AA map: put a siege with a IA army, defeat defenders, the IA army become DA, put another IA as DA, free sector, the IA army become SMA army with much more points, in 4 hours can be attached again. Rinse and repeat.