Well, don't worry about that. Because if that happen, then the Imperial Japan will have an excuse to develop a better Carrier and fighters in the run. Make a perfect ship at the beginning of the game will kill the fun. Specially kill the fun of being lose of many ships in a battle.
I think it is the time for Steve to start the game. Bad design is ok, because they are just starting units. The factions can develop newer and better version of their ships later.