Why was the roman emperor Diocletian so famous?

Diocletian is famous for his superb organizational skills. He divided the Roman Empire into Eastern and Western Empires, and completely reorganized their governments and armies which made them more efficient to manage. He ruled in the East, and both he and the Western Emperor shared rule with co-emperors. With Roman lands being ruled by four emperors instead of one, the authority was more evenly spread and easily managed. The Roman Legion was abolished and replaced with a smaller unit which gave ambitious generals fewer men to lead a revolt with. Also, Diocletian became the first Roman Emperor to retire and live out his remaining years quietly, instead of being assassinated as was the previous tradition for changing emperors. Instead of ruling with force and showmanship, Diocletian ruled with beauracracy.