One thing I might do is restrict the scenarios used so that the monster games with 18 planes pitting all ranges of planes against each other be excluded from the lists. I've never understood the fun in those scenarios unless you really like duck hunting.

I might also find a cut off for some of the scenarios so that there are not early war planes fighting late war planes where they would not have in real life.
I know I am suggesting more work but I am only talking out loud. Feel free to ignore me in whole.
