I actually think HTC needs to rethink the entire hardness setting for ALL of their OBJ's. First, as the subject of this thread suggests the reinforced concrete bunkers **should** be a bit resistant to MG and aircraft cannon fire. Currently, a single pass from the P51D can easily knock out an ordnance bunker. Likewise, those plywood and canvass constructed barracks should be able to be destroyed by a long burst of 6/.50 cal MG's. Fuel tanks? Radar towers? Town buildings?
Me thinks that HTC is holding on to the old standard of "two shots" for the average tank HE (156 lbs of damage), to destroy an OBJ. Why? Only they know. I think however, that if they would give a nod to realism that there would be no negative effect on game play. In fact, it would diversify and expand game play, imo. If barracks were to be reduced down to a hardness of 234 lbs, ordnance bunkers increased to 468 lbs of hardness (that is simply an increase/decrease by %33), that would give the cannon and ordnance carrying planes their due. On the same token, a radar tower should not be able to be brought down by a burst of .50 cal either. Getting enough hits in an area that would weaken the tower enough would be very difficult to do, hence the need for ordnance and cannon. Regarding the barracks, I can count the number of times on one hand that I've seen a mission with the sole purpose of disabling barracks at an airfield on one hand. On vehicle bases it is easy as pie and it happens a lot, but airfields the barracks are spread out and not easily destroyed by 1 guy, and in many cases 2 guys have difficulty getting the job done. Make it so those 8 barracks can be destroyed, how often has an airfield been held back by not having barracks??? Oh, and while I'm at it bring fuel back in to play: the %75 max fuel restriction is a non-issue. It prohibits nothing from upping under their normal conditions and allow them to perform their mission %99 as they would have with %100 fuel and DT. Reduce it to %50 and you'll have added another strategic element to AH. Town buildings??? I think HTC missed the boat when they put all that work in to upgrading the town, they could have/should have (imo) put 3 or 4 different sizes of buildings in the town with hardness settings of 103, 156, 234, and 468lbs.
AH does have a lot of same same settings that do not lend towards realism and offer nothing towards better or easier game play. A nod towards "realism", whatever it may be would do AH some good.