Just a couple of things I think would be cool.
1. The addition of the Yak-9UT (see below)
- Slightly faster on the deck and slightly slower at altitude than 9U
- Better guns (little more ammo) and more gun options
2. Carrier Based Vehicles (LVT's) able to spawn using the PT spawn points
Stats on the YAK models including the Yak-9UT...
http://wio.ru/tacftr/yak.htm Guns for the YAK models including the Yak 9UT...
http://en.wikipedia.org/wiki/Yak-9