I compare keeping Arda for another season to our dilemma of giving Tata another season after 13/14. Sure he hasn't had that much time, but some things are just so clearly wrong that there's no point extending it. I don't think Arda can offer anything to our midfield that we don't have in better players. Even Denis in preseason has shown more playmaking abilities and better chemistry in our midfield.
At least Vidal can provide good rest/rotation for Roberto in smaller/medium games and be really good on the overlap or even function as an option up front in attack. Arda isn't needed for this as we have better players for rotation.
Arda has showed himself to be a good rotation option - although 29yo, 41m one? That's still up for debate.
Sell him if we get a good offer
What 41m? He cost 34 million.
Yeah sell our best midfielder on the bench...
Arda our best midfielder on the bench? That's funny considering 90% of his positive impact been further forward.