That's harsh on fellaini. I like to call him a liability.
There were games were he'd play like a machine, and be totally unplayable, the problem there was they'd happen once every 6/7 games. He'd stroll around the pitch like he didn't care when the going got tough, and only flourished when the rest of the team played well.
I wasn't the only person to see this, Pienaar, Arteta, Rooney, Ferguson (First time) and to a lesser extent (due to waning ability) Cahill, were key players when they left and i was sick to my stomach when they did, when Fellaini left i wasn't too bothered, maybe it was a case of inevitability, the £27.5m, the fact he wasn't consistent enough, and the fact that well the future looked bright under Martinez, and with that money, we can actually strengthen the squad.
Fellaini just won't be missed. I wish him well, but United are welcome to him!