We must not forget that De Zerbi has been at Brighton for a year now and he's got much better players than our lot at his disposal.
If we improve defensively we'll be ok. Though, a ruthless cleanout is needes if we want to be really good at this level. We have to get rid of players who lack pace, which means Naughton, Darling, Wood, B. Cooper, Cabango, Grimes...should be sold. I am not sure Duff has balls to do that. But if we don't implement radical changes we won't progress. Our centre-backs and full-backs should be able to run faster than the fastest wingers/strikers in this league.
And, of course, we need a really good goalkeeper.