Martin, can you please PLEASE add air carriers into the game? That way it makes sneak attacks and harrassments easier and it will make the game a lot nicer. You could also transport slower units to your main attack force faster and you can carry land units over tree walls and stuff. But make them be able to be produced later on in the game so super powered slow land units like archmages don't attack with too much speed before the other guy has prepared some sort of deffense.
Since dragons are like lower hp forms of those tech blimp things and the techs have those cheap little aircrafts that can destroy dragons, you should make some sort of cheaper magic thing that can hit air units pretty good. The dragons and blimps should become the air carriers with high attack power. But make the blimps faster, it's painfully slow and a headache to micromanage.