You can use it in mb2 if you add siege teams and edit .siege file if I recall.
As for entities, you don't need GTK for that, google search entity modding it should not be hard to find.
It doesn't really matter whose build comes next, yawing aka wigglesaber as our OP friend calls it is something that would be extremely hard to regulate in any build. It's an old abuse of broken Jedi Knight animations that's been around forever.
You wouldn't improve anything against AI anyway. Whole new AI system would be more trouble than it's worth. It's a multiplayer only mod, play against other people.