Him being "slow" and unable to tackle would surely be shown up everytime he's up against a top winger as he was against Ronaldo and as he was against SWP then J.Cole on saturday. Franklyto claim that one of the top 10 sides in the world would persist in a LB who "cant tackle" is nonense. While his shooting is indeed woeful and he does hoof the ball far too much , his crossing is text-book and some of the finest in the land. His positioning is very solid , he's good in the air , he's quick and he reads the game fairly well. He has stamina and is often at his best in big games ,for these reasons he's the best LB at the team and arguably the best in the league. However, if we can get better than him , we should but with the lack of quality LB's that don't play for Barca , we'd find it very difficult to replace him.