It's ok that those air groups are at begin like in historical situation, but sometimes I need certain number of planes for certain mission / base.
Old C64 game War in the South Pasific (March 1987) did have this option and more i have played UV, more it looks like WISP. Also possibility to increase number of planes in airgroup from reinforcement pool. Now I have 220 F4F planes in pool and I can use them.
Yes, i know that this game is not intended for micro managment, but if I as commander want to load Yorktown with 90 F4F planes in single squadron, then it should be possible to do.