I have mixed feelings about Fellaini. Van Gaal and Jose got some use out of him at times, he was likeable, scored some important goals, was an outlet when played further up the pitch with his freakish chest control, and he was an attacking threat when our attack was otherwise lacklustre.
But on the other hand he was a laughing stock. In his position that Moyes seemingly signed him to play (DM/CM) he was dreadful. It's a signing that highlighted our downfall. When we were crying out for midfield reinforcements, linked with Fabregas, Kroos etc and to end up with Fellaini. That Moyes season knocked us back considerably, we were always playing catch up after that, missing out on top talents to better performing clubs, or overpaying for big names who were damaged goods and didn't fit the team.