How many average players have been key in title wins in the premier league? O'shea, Phil Chuckle, Laruen, Parlour, Dixon, Butt, Belletti, Solskjear, the list goes on!
Wiess had potential to get himself in that team if he was given the opportunity and put the application in himself. If he didn't have the application and work rate he wouldn't have endeared himself to the Gers fans in the way he did.
He was never given the chance to perform, whether thats a handful of games or whether it's a boat load.
Look at it this way, Boyata and Wiess are both at the same levels. Boyata has been given an opportunity and made mistakes but stays, Wiess is flogged. Why? Because if Mancini doesn't like you, your out of the club. That simple.
I'm less concerned about the player leaving and more concerned about the distinct lack of players available to fill our 'Trained by club' quota for the champions league registration and if the stripping of academy graduates continues in the same vein as it has in the last 20-22 months we will barely have any left!