Hi there, I'm LSgamer from the defender support team.
Got some things to just let you know of.
First thank you for your suggestion and I'll ensure it's logged.
The first thing so regarding game modes, we allow instant action to have a little wait before enemy waves do start to appear on the screen. Even though the game automatically starts you off at a critical state we believe that little wait before hostile aircraft does start to appear allows people to have a chance to start getting a few jets up at least on a cap.
With trade training, its basically advanced training yes. Trade training is the training provided for a specific job/duty. So in the game, it will have a few things to cover that is more specific on one of the certain area you may face while playing the game.
On your second comment of the tanker audio, the suggestion has already been made before by another person and was already logged for the developers to look into when they can. But thank you for pointing it out again.
Your third one regarding tips when you hover over things like identifications, there is easy to access information in game on the help panel which can be found at the bottom centre of your screen with the rest of stuff like where you can access your ASMA console.
For your last two suggestions we once again thank you for them and all of this will be properly logged.