Remember, Sissoko was playing great defensively during his first season here. He was still a detriment when he, and we, had the ball. It's just that he was so good in hunting down players that we didn't care about possession, apart from myself and maybe a few others(like Hustini).
Now he's not even good defensively. It appears that Serie A has figured out that all he's going to do is run at you and try to kill you. So, as any professional would do, they try to move the ball quicker.
Sissoko's net worth is trending down mighty quickly as well. He simply keeps getting worse and worse, and the fact we have a little more willingness to keep the ball this year means Momo has become Joe Blow.