What is also very important in my opinion: No matter what change wil be implemented, there has to be more "promotion", the effects have top be made more visibilty.
For example, while the general idea of the traditional strats functionality (resupply chain City->Factories->Fields) in AH is a sound one, it's also way too cryptic for the average AH player. Yes, there is a percentage given on some clipboard sub-menue, but that's too hidden, and the meaning is nebulous as well.
Assuming a fixed strat system, I'd like to see arena message once certain thresholds of damage are reached, like "Rook City down to 20% - Factory Supplies severly limited" or "Rook Ammo Factory down to 50% - Ammo Bunker rebuild time increased". That should create awareness and maybe get the raiders a "WTG" similar to the ones for "A94 has been captured by the Bishops".