Koeman can't buy a whole team in 2 windows. Of course some players who are deemed to be good enough will stay but when you look at the number of deadwoods it made up more than 60% of the orginial team.
Some people made it out like 2014-2015 and 2015-2016 seasons never happened. To use one season as the benchmark without mentioning the horrendous past 2 seasons is a joke.
I'm not one of those people and I doubt they even exist. But 2013/14 was more than promising. Despite the horrible league form, we still could have won the FA Cup last season with a little luck and got to the League Cup final too. Everyone turned against Martinez and he had no chance, let's be honest. But it was his own doing because we were awful. Cannot pretend he didn't raise expectations though right, with his brilliant first season. He gave us our pride back and took on Man Utd and Moyes who deserted us, with the Fellaini and Baines situations, he finished above Man Utd, he beat them away etc etc.