All in all that's definitely one of the better FREDded FA missions I've played to date. Although I have some balancing issues with it I really can't fault the FREDding that much.
Lets see what points did come to mind though.
1. The Transport doesn't actually appear to be killing anything. I still end up facing all the Shivan fighters. As such I can't actually complete the mission because Alpha wing die very quickly and then I'm just battling to survive against 3 enemy wings. You may need to self destruct a few of the Shivan ships if the explosion isn't proving deadly enough.
2. While I like the idea of the training message revealing if you're in the node or not it completely drowns out all the other messages on the F4 screen. In addition due to the build up of messages it sometimes takes a little while to change after you leave or enter the node. I'd suggest to either sending the message only every 5 seconds (so that one appears as the other one expires) or only sending the message when the status changes. Both of those would probably require the use of variables. Give me a shout if you're having trouble figuring out how to do it.
3. The game leaves you sitting around quite a while if you replay it. I suppose that's more an issue of the way the mission is set up than anything you've done wrong but there are a couple of things you can do in cases like this
a) Have the game choose from more than one set of mission banter.
b) Have the game set a BanterOver persistent variable and then use this to skip to the fun part after the player has died once or twice.
Now balancing is a rather different matter. It might be due to the 1st issue but I found the mission way to hard. I didn't have a hope of taking out the guns on Medium without 5 shivan ships appearing to shoot me in the arse.
All in all though this is a good (if very hard) mission.