Well, if Louis XV is the great king of the french Bourbon dynasty, he may even be seen as a greater king than Louis XIV, whatever are his personnal vices. Because if he made terrible mistakes as far as diplomacy and war were concerned, he was enough authoritarian to know how to make decisions in interior/domestic affairs.
Leading to the revolution is another thing.
Revolution or not, there was a strong movement of modernisation in 18th century France. France perfectly could have taken some kind of british path of gradual political reform for a rather similar final result.
Tocqueville wrote something like what follows. If you considered the structure of the french ruling elite in the 1780's and in the 1820's, you could distinguish no fundamental change. Basically you had the same alliance between the high nobility and the richest bankers and financiers, merchants and businessmen.
The revolution did not much change of that but it completely changed the political values.
Though very unpopular Louis XV had decided and implemented a real revolution with his chancellor Maupeou in the last 3 years of his reign.
But his successor Louis XVI, who had absolutely no authority, had this reform repealed.
As far as Quebec is concerned, and more globally the colonies, il you have France win a decisive victory in the austrian succession war, with as I suggested the french gaining the austrian netherlands and expelling the british from their indian stronghold of Madras, then you can imagine completely different evolutions.
The British will not dare to start a new war only 6 to 8 years after the peace of 1748.
The french profit a lot from their relatively dominant position in India compared to other european powers. On these foundations, they can develop in bigger proportions their trade, their trade and war navies, ... etc. They can maybe send more settlers to north America, so the english colonies remain contained east of the Appalaches.
The British have to find a new land to send their surplus population, which could be Australia. But before this, this situation could cause serious trouble in Britain as well in the british american colonies because of over-population and the containment imposed by the french.