Those modifications completely change the game. Specifically, bombers with a 2 cost are so good that every country should make an all bomber buy and Russia, UK, and USA will produce no IPC from round 2 forward. The game will be determined by whether Japan or us gets hit by SBR. Very likely Japan through bury.
While we are going with game modifications, why not make all units free with unlimited movement and 6 attack and defense? That would make things most simple.