This notion that injuries have somehow taken their toll on him is bollocks, and is just being used as an excuse by those who've always banged on about how amazing he is.
He's always been average since day one. His only great games have been against lower league opposition or Europa League group games. Poch's worst decision was to give him a new contract. He should have been released this season instead we'll struggle to find anyone to match his wages. I predict if he leaves it'll be on loan and we'll be subsidizing his wages.
If he goes to a team without any really top players, you'll see just how average he is, he's always benefited from having talented players around him, both here and at Roma.
If he does turn out to be Eriksen's replacement, then we're basically fucked.