Chelsea are known for giving coaches their first major breakthrough so if it also happened to Graham Potter I won't be surprised. Before Sarri came to Chelsea, he has never won any major trophy irrespective of managing big clubs, Chelsea gave him his first trophy and made him a search after coach. Graham Potter will definitely win cups with Chelsea it mightn't be this season but this is definitely going to be the building blocks as he'll be using this season to observe his players but still give us something we can hold onto as he gets his own players next season.
Maybe you are right. Giving Graham Potter a chance to work independently could solve all of Chelsea's problems. But we cannot say for sure. The whole situation of the Chelsea team is unstable now. They are not able to perform well as a team. So it is likely that Graham Potter will make some changes to their squad next season. But first he should fix his match strategy. Consistently good performance is impossible without a proper match strategy.