Since very early in the season I have been saying Sarri needs time to implement his style. The club messed up badly in not allowing him a pre-season, by dawdling over his appointment. In many ways a good start to the season ended-up backfiring on him when performances dipped because expectations had been raised. Overall though two cup-finals and a third placed finish is not a bad return, although at times the football being played has been frustrating (to say the least). We've also had a lot of games with the runs in the League, FA and Europa league leading to not many clear training days (as opposed to match preparation days) to work on things tactically.
Looking ahead, my gut feel is that the transfer ban will be in place for the next two windows, so no incoming players this season. Given that one big challenge is for Sarri to assess which of the returning loanees have the potential to strengthen the squad. There have been extremely good reports coming in for: Tammy; Reece James; Mason Mount; and Tamori to name a few. OK, Hazard will undoubtedly leave, but we do have Pulisic coming in. I'd like to see Batshuayi given a chance to, he scored goals for Palace, can he do much worse than we've had this season?
What we do seem to lack are leaders of the pitch, people who in old-parlance pull their sleeves up and get stuck in when things are not going well. Azpi and Luiz are experienced, but I think Luiz is often too focused on his game and Azpi is not JT. Maybe Jourghino might stand up to the role now he is more settled in the EPL. I also think we have very much missed Steve Holland since he left for the England set-up (to England's benefit), I'm not sure what he did, but I am sure his departure was significant in the decline from Conte season 1 to Conte season 2. Maybe we should get Jody Morris back as I think he could play that role and help integrate the young players. I am unsure what Zola and Carlo really bring too the management set-up other than translation and placating the fans.
As far as the second half this is concerned Sarri should read Clive Woodwards autobiography as there is a whole section in that on second-half thinking.