First off, let me say that both this product and the author are excellent, and I love GSX so much, I have disabled AES on every airport I have it.
That being said, I think there are some things that could be worked more on, or tweaked to work better, and I wish to use this topic to talk about these issues as and when I see then. The first one is the movement of the pushback trucks: When the trucks are making a turn for instance, the wheels look understeered, and because of this, it almost looks like the truck is just (I don't know the word to describe this). When you look at the current AES pushback trucks especially when they're turning, you'd understand where I'm coming from. The wheels actually track the circle of the turn. and the steering of the wheels is proportional to the turn. This is not the case with GSX vehicles in general. Sometimes (especially after the pushback is complete and the truck has disconnected), it looks like it just spins around without the help of it's wheels (which reminds me, I think the marshaller or whoever he's called, that connects and disconnects the truck) should step aside to the right or the left of the aircraft after the pushback. It looks awkward to see him standing in front of you (even after he has cleared you to taxi) as if he has suicidal intentions).
One more thing about the wheels, I think they overspin. By this I mean you could see a vehicle doing 2 mph, and when you look at its wheels, it looks like they're doing 15 mph (this is just an example). They spin so much it already looks like they're spinning the opposite direction to the movement of the vehicle.
These are the most obvious issues I've seen so far, and please I don't mean to put anyone down, this is a great product, if these can't be fixed, then they can't be fixed. But if they could, I think they should be looked into.
Cheers and keep up the good work
Chidi