Link in the first post updated once again. Sorry for quick update, but I think afterburner issue needed to be addressed ASAP.
Turns out that $Afterburner Use Factor is not really flexible. It only accepts integers where values are 1 = 100%, 2 = 50%, 3 = 33.33% and so on. So there's a huge drop between values 1 and 2. I fixed this by editing values across the board to 1, which makes the AI to use afterburners as often as they can, within their own logic. Hopefully Sushi can address this problem and give us the missing range between 100% and 50%.
Another more minor change is that there is higher chance of AI firing a missile at player especially at lower difficulties.