RoF runs perfectly with 15 vs 15 in direct combat. I'm not sure one would expect to see bigger furballs than that in WW1. Whether or not it can handle more than 30 planes, as would be needed in a proper dynamic campaign that would have various planes at various locations, I have no idea. But as CoD has no such campaign anyway it's a moot point. CoD's big advantage, if the game is ever fixed, is its 128-player MP, with AI available to go into the mix too.