Poche's track record in the EPL did not go too well and indeed his name rose only because he was at PSG and even then only succeeded with the Coupe de France and Ligue1 which PSG certainly controlled well afterwards there was nothing really proud of Pochettino.
Bringing Pochettino back to the EPL is actually a very risky way but at least there is a desire to change the club at least this is still a little better than when Chelsea was trained by Potter and Lampard even though until now there has been no breakthrough that can really make us amazed by what Poche did. Hopefully Todd's current decision is right and the hope of bringing Chelsea to a more decent position can be done well even with the reshuffle and some controversy when bravely changing almost all the players at Chelsea.
Pochettino is not completely bad, but Chelsea transfer policy is the cause of Chelsea decline this season. Overhauling the squad by 80 percent is a very risky step, building a squad with the majority of young players who lack experience, Chelsea will automatically lose control as the season progresses. Another fact is, the players they loaned to other clubs performed better, Lukaku and Ziyech performed impressively at their new clubs. On the other hand, we realize that Chelsea does not have a very busy schedule because they are absent from European competitions this season, their full focus on domestic competitions has failed to be managed optimally.Bringing Pochettino back to the EPL is actually a very risky way but at least there is a desire to change the club at least this is still a little better than when Chelsea was trained by Potter and Lampard even though until now there has been no breakthrough that can really make us amazed by what Poche did. Hopefully Todd's current decision is right and the hope of bringing Chelsea to a more decent position can be done well even with the reshuffle and some controversy when bravely changing almost all the players at Chelsea.
Pochettino need for an experienced and proven striker cannot be denied, Chelsea front line is very worrying at the moment. The problem of player injuries is still understandable, but fans will not accept it if Pochettino fails to bring Chelsea to a better finish than last season. The January transfer window is the best place to find solutions, there is no instant solution at the moment apart from recruiting new players, but they also have to be selective so that they no longer buy players who seem like failed investments.
I completely agree that ETH positioned himself wrongly in the club - he thought that he could be the “big boss” instead of cooperating with the players and this led to conflicts (I’m sure, in addition to the open conflict with Sancho, there are also other hidden ones). Maybe this model of behavior worked with young players at Ajax, but in serious clubs where there are already established stars, you cannot behave this way. In the first season, he was forgiven for a lot because there was a result, but now he has no trump cards. 
