Think Song is a bit underrated by us; he had one major weakness - his positioning, but added to his lack of pace makes him a very flawed midfielder(should at least have pace or good positioning).
However when used properly ie say infront of the back 4 with little area to cover(fullbacks, dropping deep to help the CBs), he can be a WALL. Just compare his performances in 2009/2010(played as a holding midfielder) with his performances in his last 2 seasons with us(as a box to box midfielder), difference is like day and night from a defensive point of view which is in itself not a surprise given his strengths and weaknesses. Song was very strong in the duels(hardly lost a 50/50), very good in the air, good passer, decent vision, good touch, was very skilful and had very good close control which enabled him to dribble through a crowded area(premium quality for a central midfielder to have).
I always thought he needed upgrading, but we shouldn't have sold him and given a free pass to our squad players into the 1st team(I have little doubt Wenger would have been starting him if he wasn't sold), but we should have added another 15m to the 15m we sold him for and gone for someone like Martinez.
Anyway, Williams - please no.
