Ehhh, Mbappe got a CL final and two semis with PSG, he scored in semis, quarters and R16s so IMO, he delivered somehow. The only thing one can take against him is that flabby shot against Neuer in the final which he should have buried.
The relationship with Nasser the last 3 years was in the gutter, he couldn't continue there. And really he was bound for Real in 2022 but Macron pressed him to stay at PSG.
Also they should have gone to the final last year against BVB but they couldn't score. They went goalless on like 5 xG (!!!) and they hit the posts 6 times across the two legs, which can only be explained by dark voodoo shyt goi
ng on 
That said, I agree that the team is now better and more complete. Enrique needs a team of players without big egos and also forwards who press and do their defensive duties and Mbappe don't. It was best for all sides involved that he left for Madrid.