AH3 is imo at the point now where the rest of the community really needs to start moving over to AH3 full time. There is enough different in AH3 game play wise that remaining in AH2 now is going to be detrimental to when you do move over.
Im finding in some ways including how you fly is very much like learning the game all over again. Some things are similar in flight. But others are very very different