all these suggestions imho are really nothing but more gameplay concessions for bombers.
how is bombing a building in sector xxx gonna weaken a fh accross the map? most structures take just 250lbs to kill. 110g, p47d30, fw190f8, p38, most navy planes can kill hangers on their own.
You want these made "weaker"???

.
If anything heres what should be done.
Make the factory complexes larger with more structures. Each of these factory complexes produce xxx amount of materials. Total all this together you get total production for each country
ammo factory 20% (at full capacity)
fuel factory 20%
radar/electronics factory 20%
training / army bases 20%
aaa factory 20%
(if i missed a factory just readjust the % but you get the point)
total 100%
These should have their own town/city nearby and their should be several of each around the map. (if we are moving to 512 x 512 maps).
Now I would like to see things like oil fields and raw material structures (mines wharehouses rtc)
All of this should be linked by rail and road. trains and trucks need to get materials to the factories which need to get processed into useable material that is then truck/trained to the fields.
Rail stations should be placed strategically and some day rail and road junctions that are "damageable"
All these facilities should be made capturable and heavily defended by aaa and flak. and protected by a vbase. Get rid of strat zones and do not divide up the counties into multiple fronts. (ie in the pizza map give each country its own slice)
If a country production falls below a certain level then reset the arena.
Field capture would still be in effect and if any country is reduced to 1 airfield reset would happen as well.
All fields should be resuppliable. Go back to way it was before where 1 m3/c47 repairs an airfield.
This would complete the strat model in ah and give the bomber pilots a reason to feel "useful". Furballers and guys just interested in instant quick fighter action can enter the arena and not worry that it will take 30 min to an hour to repair some fhs or if fuels at 25% since fields can be easily resupplied by m3/c47s. Nothing else should be implemented to stop fighter to fighter combat. Its what most folks do in ah by far.
There will be a reason to hunt trains and destroy train stations. Theres will be an actual effect to bombing based on something more "real" then field capture. Make field capture harder add more flak/aaa to the towns and place a vh there (either move the one from the field closer or add another)
I'b personally like ah they way it is now. The minority of folks who fly bombers regularly in ah have always wanted to feel "usefull" so I say in the interests of shutting them up please consider my suggestion.
Edit
Even destroying a factories production should not oimpact the fields. as longs as trains and trucks are running each field should get its "full supply" reducing production is only an added trigger for a reset.
Also structure down time ought to be linked to the amount of damage at its nearby twn. Bomb and kill the civilans in the town or dehouse them and they dont repair the factory as quickly. This will give lancaster pilots something to do.