Chelsea will not make the champions league spot next season, it will take them time to build a team that will challenge for trophy none get the champions league spot in the league, coach pochettino has experienced in the league as former Tottenham coach, this Chelsea squad he inherited are baby's squad, they can't make it to any competition finals, to me he should just change the full squad, because none of them are fit to be called a Chelsea players, pochettino has to bring in good players that wants to play for the club not the ones that are influenced by salary. he should sell more than half of this current squad regardless of the years on their contracts, if he wants to succeed, because this current Chelsea squad will disappoint him like others.
If Pochettino have that winning mentality as a coach then transforming Chelsea won't be difficult but if he is like other coach that has work for Chelsea , even if Chelsea still bring good players not will still change. The previous coaches worked with good players but it was still not well with them. I'm believing their will be a difference in pochettino as coach because of his experience. Chelsea has really suffered, it will be too much for the club to continue with the bad performance next season.
I think Pochettino is risking because of joining Chelsea in this situation, Pochettino is the coach who won the champions league when he was working at Tottenham in 2018-19 and he got some achievements when he was working on PSG which means Pochettino is a famous coach but Chelsea is not in a good situation and none knows if they get to have a better situation with Pochettino or not.
Pochettino usually prefers an attacking style and high pressing but he can maybe change this if he joins Chelsea.