The small maps can be reset in mere hours, the large ones can stagnate all week.
Therefore, I vote once again for the 24/72 hour map duration standard:
Any war win within 24 hours will reset the same map. After 24 hours, a war win results in the next map in the rotation.
Any map still up at 72 hours will be reset to the next map in the rotation.
Also, when the war is won, the arena should remain open for 15 minutes, while the next map is simultaneously opened in a duplicate arena.
This will let any fight continue on and give base takers a head start on the new map.
As it is, it often takes a while to build up a fight on a new map. This feature would help get things moving faster, similar to the Off-Hours Arena thing.