The best way to illustrate this would have been to tie bomber groups (squadrons also) for both sides to SPECIFIC ground support units. Instead of the generic "Aviation Support Regiments" that we have to work with. Then you could still fly your planes anywhere you liked, but if the support units weren't there to tend to them, you would be flying w/o proper support and take a large hit on operational planes. Kind of like the 17's early in the campaign, until the parts and mechanics caught up with them.
I like your general idea. The separate aviation base forces presented in WitP should only reflect the support personnel manning the fuel and ammo dumps along with the administrative and supply types. It is most unreasonable to assume that these troops were trained in the finer points of maintaining dozens of different aircraft models.
Most air units, allied and Japanese, had indigenous maintenance personnel in each air unit who were trained in maintaining that particular aircraft. So your idea of designating the aviation support units to specific units has merit. Unfortunately, it will never happen as a change but could possibly be handled through house rules between honorable players.
Chez
