To what extent did Edward bring stability to England in 1465?

By this time, Edward IV was in the fourth year of his first reign as King of England. With the help of the Earl of Warwick, he had been able to score a succession of impressive victories over the rival Lancastrians in his bid for the throne. However, Edward's reliance of the proud and chronically undependable Warwick meant that his grip on power was never entirely secure. Edward's decision to marry in secret the commoner Elizabeth Woodville was regarded by Warwick as nothing less than a personal insult, a humiliating rebuff to his strenuous efforts to find Edward a suitable French bride. Edward's clandestine marriage permanently damaged his relations with Warwick, turning his erstwhile ally into a sworn enemy.
Warwick conspired with Edward's younger brother, George, Duke of Clarence, to depose Edward. Initially, they were successful, and Edward was briefly replaced on the throne by Henry VI, his weak and vacillating predecessor. However, Edward fought back and soon regained the throne. Warwick was killed in battle, while Clarence was convicted of treason against his brother and reportedly drowned in a large vat of wine.
Thus began Edward's second reign, one in which he was finally able to achieve some degree of stability in his deeply unsettled kingdom. He took control of the nation's finances and built up a chamber system to oversee royal revenues, subsequently enabling him to reduce the country's debt. He also enhanced his authority as king by establishing a magnificent court that reflected his glory and sovereignty as monarch, binding the fractious aristocracy more closely to the Crown. Edward also took a lead role in promoting a common culture, one heavily influenced by notions of late medieval chivalry. In doing so, he provided a deeply divided, war-weary nation with some degree of cultural unity, strengthening the foundations of his throne in the process.
https://www.historic-uk.com/HistoryUK/HistoryofEngland/King-Edward-IV/