Yes I remember that (Ur-quan mentioned it), but I wouldnt think there would be a need to join both hangars together solely for that. There must be something else that influences the gameplay somewhat. Its also interesting that at first, the upgrade costs coins, but the higher end costs lots of gold and silver tokens. That might be an indication that with the new change, people are going to want to expand their fleets. Unless a player's gaming style requires them to have a lot of the larger planes (5 or 6 condors for instance), I don't see a large benefit in expansion under the current game structure, but thats just my opinion.They (Ivan or Urquan) mentioned about plane customisation a while back.
Love the idea of plane customization though; look forward to it.