X4 Foundations is all about opportunities that open up when the experience of your crew members grows. Too bad this takes a lot of time and you need to wait before your pilots or marines will be able to effectively accomplish all the missions.
That is why the LAtT mod is such a powerful tool, as it increases the speed of improvement of all your crew members. In just one hour your pilots, marines and other personnel will gain an additional star, which means that they will gain complete skill set in just five hours.
If this sounds too good to be true, then don't worry, as this mod does not interfere with the normal processes of the game.