Finished listening to it and I might as well add something.
Some of the Expanded Universe books do try to depict the Empire somewhat differently (though it helps that, after Endor, the Empire broke into competing factions that fought each other; an author can always trot out another murderous Imperial). Thrawn is actually one of these. He isn't the standard "murder everyone" villain. He uses cunning, bribery, and not so much genocide (he will kill, but not without justification). The X-Wing/Wraith squadron series of books had a few as well.
As far as World War I flight sims, I think Wings of Glory by Origin is a pretty good one. Fly missions to attack trains, tanks, cars, factories, and even Zeppelins. Back on base, talk with squadmates about the progress of the war.