Was Charlemagne partly able to hold together an empire due to having seen the Merovingians be overthrown?

Did the history of the Carolingian overthrow of the Merovingian dynasty still echo in the mind of Charlemagne, making him less likely to make the same mistakes again, and therefore be better ruler? Or did his lack of planning for after his death doom the Empire to be divided?

Were people confident in the power of the Carolingians?

To what extent was there a sense of confidence that the Carolingian dynasty could maintain its power and empire and not collapse like the Roman empire had done? Did people really believe that things were different this time round, that the Franks were indeed the chosen people of God, and that God would ensure their lasting success? Did the Carolingian Renaissance play a role in creating such a new confidence and outlook?

The Rise of Western Christendom (2nd Edition). Peter Brown

Chapter 19 “To Rule the Christian People”: Charlemagne. This chapter offers a good overview of Charlemagne’s reign and the various reforms in Christianity, education, and language he implemented, also the reasons for them. Peter Brown also raises the question of whether these sets of changes instigated by Charlemagne were merely reforms or a Carolingian Renaissance as some scholars argue. In which he argues they were reforms.