He's done the basics right, which is all you want from your youngsters. His defensive work is top-notch and his work-rate is admirable. Let's not forget he's 18! I would have more doubts about a young player who shows skills and flair like Kakuta than a young player who just does the basics right and keeps it simple like Bertrand. Anyway, I don't think Shurrle will do much better in the PL, tbh.