The biggest problem I see with this is the defenders are still losing an airfield to use to defend from. As the line moves over you are forced to abandon the field. It's pretty much the same as when the horde flattens it, not much of a difference.
To spread the fight out, maybe a twist on the old "ordered capture" system. To take a field/base you have to meet the requirements we have now, but add to that they must also have 2 adjacent towns down to 25% as well. This would have the horde hitting the main objective, but then it would have to split to hit 2 other towns as well. Giving defenders more time to defend, and busting up the horde a bit.
One thing that the 113th Lucky Strikes does when we are able to capture a field is to hold in place , defend until the town starts to rebuild or in the case of airfields and Vehicle bases, re-supply. At times this may mean sending out strikers to take out a VH that spawns into the base or making strikes against Ords at nearby airfields, to prevent them from coming in heavy.
My feeling is that the strategy part of the game play could be improved. I’ve love to see more towns connected a road system that actually had an impact on game play, with open areas in which Knight, Bishop or Rook engineer teams could build Vehicle Bases or Airfields, rivers with bridges that could be destroyed and rebuilt,
Change Airfields so that there are limits to the number of aircraft that can be launched. There were few airfields in WWII that supported both bombers and fighters. There was a limit on number and type of fighters that were based at an airfield,
Any aircraft could refuel but only a limited number were actually based their. Perhaps if the rearm pad would allow a more flexible choice in rearm. You could chose a new load out both fuel and ord. If you had to fly from a base in the rear . You could go with no ord and re-arm at a forward base with ords.
Perhaps we need to put troops in both places towns and airfields and when a base is captured it needs to be re-supplied or it stays down. You need to put troops in the town and engineers on the Airfield to get the base functional again.. You need move troops and supplies to get AAA and Anti aircraft functional. Or it’s down for the hour.
A town could have a nearby airfield and a nearby Vehicle base and perhaps a nearby artillery base. One that can put up Anti Aircraft cover over both the town and airfield. You would need to capture all three to secure a sector.
Some sectors would have all three bases others two and some just one. Make deploying engineers to build remote airfields or bases that would need to be supplied with logistics. Move things to fight over and about.