I think Enrique will already have a lot of respect at PSG and even if the team goes through some difficult moments they will give him enough time to fix the situation. If everything goes well I believe PSG will want to extend Enrique’s contract for as long as possible because this season he has proven that he can achieve top results with young players. It was a big experiment and probably a certain risk when he started building such a young team but he managed to win the Champions League with them and that is a huge achievement for him.
After winning their first Champions League title with Luis Enrique, PSG management may not want to let him go easily. Even after winning their first UCL title, they may not have made a mistake in paying tribute to Enrique. Enrique has not yet been able to fully organize his team, he may need some more time to bring the team to consistent performance. I would expect 2-3 more seasons to be consistent in the Champions League. We may see Enrique's poor performance in a few days, because his team is already becoming a threat to other teams.