agree with you. i can see his usefulness in terms of set pieces and defensive aggression. but offensively he is unable to generate forward momentum from the back, and it keeps us penned in until we boot it up field. although a lot of people will claim we dominated the match (and we did for the most part), there was definitely a spell between our first goal and the end of the first half where we were in trouble tactically and unable to move it forward effectively and inviting counter attacks from them. mustafi was a big part of that.