He means there arnt enough planes to particularly represent the Eastern Front as well as the Pacific to a lesser extent.
eg Soviet and Japanese Aircraft are under reoresented in terms of types. 3 x Soviet fighters vs for example v 11 British fighters.
That and the current terrain tiles are very definitely Western Europe in influence. The new terrain will fix that, but the MAPS we have are predominantly European as well. There's only maybe 2-3 maps on the Mains that could REALLY be qualified as "PTO."
When the new terrain is released I might toy around with my ComSoPac map idea again. It had a recreation of the Atoll from the old AW Pacific map in the center, and was mostly small airfields scattered around small islands with an "HQ" island for each country with much denser distribution of bases. Ports were all at the country's HQ base, with one more on each country's "forward base," (along with a strat). Losing a CV would REALLY hurt because of how far the boats would have to travel to get into the action, so smart usage of the task groups would be a major key (as opposed to running them up right off the shore).