Agree with this. For some reason he can't the same level of consistency. Look at Kompany years of playing at such a high high level every single week. Stones doesn't seem to be one of those lads that's ever short on confidence he'll always try to keep doing what hes doing which is great, But he suffers big with lapses of concentration.
My main fault with him he's too soft to be a centre back he needs to be far more aggressive to reach higher standards.
Agreed he is bullied and knocked off the ball too easily. When he came in against Spurs at the end of the season he was all over the place, it was like he had never played for us before. His marking and positional awareness haven't improved or his lapses in concentration. On his day he can look world class but he isn't consistent.