Mick Cooper
summed it up pretty well.
Chadli is by no means a mediocre player. It's just that he isn't good enough to be a key a player in a team that is looking to break into top 4 just like 85% of the squad members. IMO his quality is on par with
Syggy and Dempsey who would be well suited in teams like Villa, Swansea and West Ham.
Poch desperately wanted to get rid of him in Summer to bring Depay, unfortunately he refused to join to PSV and killed our chances of signing Depay.
He's average and a decent squad player at best and if some think he should be one of our important players in the future then we might as well be competing with West ham, Stoke and Newcastle for top 10 finish.