Well the interesting thing about this is that the Philippines had ample warning about what happened at Pearl Harbor. They even scrambled all the B-17's early on the 8th when there were enemy contacts on radar. However, just before noon they all RTB'ed for fuel. The radar at Clark field spotted IB enemy planes more than 140 miles out. For some unexplained reason only the pursuit squadrons were alerted, and the bombers just sat on the ground during the attack, with over 1/2 destroyed.
In the aftermath of Pearl Harbor many generals and admirals had to face court inquiry's about what happened at Pearl and were removed from command. There was never an inquiry into what happened in the Philippines and why so much equipment was allowed to be destroyed when ample warning was given.
As for the balance, I believe that most people would rather have a fair and balanced FSO rather than fight a "historically accurate" FSO. I try to balance them as best I can, but to have one side with a clear disadvantage would only drive away participants in my opinion. I hope we'll be getting some new planes to fill out this plane set as well but for now this will have to do.