Gagliadini failed because of his mentality for me. When he started to make mistakes, he stopped taking any risks, playing only safe and easy options. Thus, he has limited himself to his current, useless version. Brozovic was also in a similar situation, but he has found his spot.
I've seen that Asllani has a lot of energy and he wants to participate in all phases of the attacks, from building till the attacking of opposition's penalty area. For me, Inzaghi hinders him in this registra position, and Asllani should be used similarly to Sensi.