I'd love to see a Gotha, Re8, Rumpler, FE2b, DH4, BE2c too......but the problem would be that they'd be sitting ducks

Realistically, in the game some aircraft like the BE2c would probably only have 2S2, 2R2 and 2L2 moves plus a couple more. If you had some of those aircraft, they'd need to be operated by the Server on automove -
Eg: you could have a mission with 4 human pilots against 8 computer pilots flying bombers on a medium board, where the objective is to shoot down the enemy bombers before they reach the allied lines. You could even then incorporate human players escorting the bombers.
I think that's the only way you could incorporate some of them without having to fly kamikaze missions every time you want to fly one....which is a shame because I'd like to fly an FE2b or RE8 in particular!