Taking emotions out of it, his form has been up and down in his time here, you can understand why some see the glass half full with him, and others half empty, I'd say with LvG, he's been his 4th choice CB for the majority of the season behind Smalling, Jones & Rojo, he's also made a few poor passes that could well have seen us punished which i'm sure a manager who scrutinises every game in minute detail will have picked up on.
When you think he's had his injury problems as well, then you have to come to the conclussion LvG cant be too enamoured judged on what he's seen from him since his arrival, it wouldn't be a shock to see him leave this summer.