The problem is Formation, Hakan doesn't fit 3-5-2 formation, he was best deployed at 4-2-3-1 Pioli formation which is deploy as AM.
This guy have same problem like Eriksen when he coming from Tottenham, from attacking to more centrally, which is had responsibility to defense and playmaking.
Hakan most dangerous weapon is long range shooting and set pieces, which is very hard when we deploy 3-5-2 formation.
This formation is very depended to our 2 striker and 2 wingbacks and defensive approach from midfield.
I wont throw him critics after 8 games, but if in 8 months he can't addapt, i will sell him to other teams because we need more impactfull player.
The perfect example good midfielder at 3-5-2 formation is SMS at Lazio, and the best potential player is Kessie.