If you remove emotion from the situation, he has 6 assists (yes I know that’s just one metric), in 165 PL games.
On average he’s just nowhere near good enough to be a regular top six starter, but as always the key question is ‘who replaces him’? I’d rather keep him if we don’t have a ready made replacement coming in and we’d be mad to sell him with no one coming in (as he has managed to avoid the injury curse thus far)