Currently, the worst a fighter can have for fuel due to destroyed fuel tanks is 75%. Ultimately, this does nothing and has no effect on AH. There are so few fighters that are effected that it makes destroying fuel tanks on the fields and bombing the fuel factory almost a worthless venture. There are but a few planes effected, and even then they are not effected enough to keep them in the hanger for their intended roles are not hindered.
If the effects were lowered to 50%, THEN we may see a broader effect. THEN we may see missions with the sole purpose to damage fuel tanks. Until that point, fuel will only be an afterthought. If 50% fuel was the maximum fuel some fighters could use, then planes like the F4U-1A, P51x, P47x, 190A-8, and most of the Japanese planes would be that much more important because of their large fuel capacity. Likewise, the Lancaster, B25, G4M, and He111 can go much further on 50% fuel than many bombers on 75% or 100%.
Think if it no different than the ords (actually, it would have LESS of an impact than having ords down). When ords are down an entire class of aircraft have no use (bombers), and it severely restricts the use of another class (jabos/dirt movers), and it really only allows 1 class of aircraft to prosper (aside from slick fighters): the tank busters armed with AP cannons (IL-2, Hurri IID, and Stuka G-2).
This would give the base resupply guys no further burden, really. If the fuel is down, then the ords are probably too. Either way, it **adds** to the strategic element.
Please consider increasing the effect of fuel tanks being destroyed to %50 maximum fuel.