Luiz Enrique has always been a good coach for Paris Saint Germain, the only problem he faced was not being able to win the Champions League but last season he broke the barrier and won the club's first ever Champions League title and also won the treble. PSG has indeed conquered Europe last season and became one of the most formidable teams right now. PSG has dominated the French Ligue 1 and looking at the structure of the team currently, one can say that they still have the potentials to emerge the league's title winners in this upcoming season.
The Ligue 1 will not be a problem to PSG going by his tactics and his antecedents so far but I think there they will have more issues will be with the champions league, defending it will be a very tough one because most teams wants to get the champion leagues title from PSG so it will.be a struggle for them to defend and this is when Enrique will show his ability more in situations like this, if he defends the title then it will be an incredible record he has set and will take probably long time.to be broken.
PSG winning the champios league back to back won't be easy if not Real Madrid who has done this i don't think any other team has done it just as you have said it will be an incredible record for Luiz Enrique and PSG if they can defend the tittle back though nothing is impossible if Real Madrid can do it any other team can do it too but its not an easy tournament.
It is very easy for PSG to defend the French league 1 tittle french league 1 tittle seems to be their birth right they will always win it.