The more you use transports, the higher your rating gets. Whether it's for expanding faster, getting units to the front faster, or crushing with arty drops.
What separates good players from great players
Constant small improvements. Watch replays and casts, if you think you have nothing to learn then you are planning to fail
Easiest way to sum it is efficiency overall.
Use resources for best returns, have better awareness what to do when and what fights to take, scale & balance your eco better, micro units better etc. The higher the overall efficiency of everything you do, the bigger your advantage, the more options you have and leeway for potential mistakes that could otherwise be game-ending.
Mods
“Be a yardstick of quality. Some people aren’t used to an environment where excellence is expected.”
— Steve Jobs.
My UI Mods