Mauricio Pochettino is a manager that I respect so much not just because of his catchy and very professional attitude on the touchline but also his tactical prowess and his ability to dictate his team's weakness during matches while making substitutions where necessary.
He'll definitely make a great manager at Chelsea as he has the capacity to effect positive change on the club
It seems I'm the only one that does not trust Pochettino that much.
I believe he will make Chelsea better, they will play better and they will be more united than they were last season, but I don't think he can turn Chelsea into title contenders. We've seen Pochettino coach different teams. He was good at Tottenham, but that was all. His best at Tottenham was finishing second and getting to the champions league final, which is incredible, but not winning a single trophy speaks very poorly in his resume.
At PSG l, he was not a very good coach either, he managed to win the league but his team was awful. Pochettino's PSG was a pain in the eyes to watch.
So judging by his track record, it's hard for me to be optimistic about Pochettino.