What you actually post basically boils down to 'Sissoko is always sh*t'. I'm sure you can find a tropical parrot to repeat it back to you over and over again, since that seems to be the 'answer' to your post that you actually want.
Do you think Sissoko has technical skills good enough for a top 4 side?
How are his:
ball control skills?
passing skills?
balance on the ball?
crossing skills?
shooting skills?