Was Diocletian the First Emperor to Reform the System to Stabilize the Empire?

WAS DIOCLETIN THE FIRST EMPEROR TO REFORM THE SYSTEM TO STABILIZE THE EMPIRE? OR DID HE BUILD ON THE ACCOMPLISHMENTS OF EARLIER EMPERORS FROM THE THIRD CENTURY CE?
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Diocletian was the first emperor to reform the system that stabilized the empire. The crises of the third century ended under Diocletian's rule. Diocletian was born in Dalmatia, contemporary Croatia; his father's name was a freedman scribe. He took control of the Roman emperor after rising through the army ranks and killing his predecessors. His deeds as an emperor enabled the Roman empire to last for more than 20 years. However, he experienced challenges emanating from restructuring the central government, recovering the seceding and rebellious provinces, defending the frontiers, and eliminating the conditions favouring consisted attempts to seize the thrones. The solutions provided by Diocletian to address the issues in the third-century crises were focused on developing the efforts others had attempted but were excellent under Diocletian's rule. As such, Constantine I continued with most of the policies implemented by Diocletian.[Potter, D. S. Ancient Rome: A New History. New York, NY: Thames & Hudson, 2018. (255-279)]
During the crisis in the third century, the emperors experienced challenges such as ensuring a stable succession and defending the far-flung frontiers in Rome. As such, Diocletian attempted co-emperorships severally in the 3rd century. He created the tetrarchy system that split the empire into two sections. Each section had a senior and a junior emperor ruled by Augustus and Caesar. The rulers were four in number and maintained a court in the region's hub under Diocletian's control. Also, Diocletian had a personal bodyguard who acted as the main in the mobile army. The person bodyguard played a significant role in ensuring that the coins used in the Roman empire were minted in Diocletian's name. However, the laws and regulations of the emperor were made under the terms of the tetrarchy members.[Southern, Pat. The Roman Empire from Severus to Constantine. London: Routledge, 2001.]
After approximately 50 years of barracks emperors, Diocletian decided to rehabilitate the emperor's authority by focusing more on the sacred aura and incorporating the sacred protocols and rituals that had surrounded the Persian Kings. The system developed by Diocletian functioned well. Diocletian operated as the senior Augustus, which was enabled by his unique personality. Although the plan had worked properly, it collapsed in 305 CE after Diocletian had retired.
During his rulership, Augustus Diocletian reformed the taxation and financial systems of the Roman empire, which helped in addressing the physical challenges experienced during the time. According to economic historians, the tax and financial reforms implemented by Augustus Diocletian had hidden consequences. Notably, the sections of the empire played significant roles, such as preventing other generals from affording a large army that could overthrow the throne and creating taxation roles. The strategy implemented did not distinguish Rome and Italy from the Empire. In the 3rd century, Italy and Rome had been mandated to provide the financial resources re...