Not sure what you are really asking for.
The zone strat system was that different complexes only effects some of a countries fields. Bring this back would have the effect of bombing strat becoming less effective, and hence again it would become something not used.
So is it that you want strat different places on the map, or that you wish it to only effect some fields. And what is your real desire in asking for this back. Vissual, less effect, more places to bomb?
HiTech
Im not a bomber pilot, therefore im not really looking for more bombing targets.
Only asking for the visual stuff: that city is pretty cool looking, yet i cant see it much. Whats the point of it then? Placing 3-4 cities near the front line (withouth being valuable strat target, or even without ack) would help a lot on the immersion.
Also, off topic, i know, but this would allow some tank action in theese cities. Imagie a tank-town with all those buildings, lets say, in the trinity... i know, im dreaming big