Silverwood is going to carry the can for this I reckon.
It's not just his fault. He has mostly average players, especially batters and spinners,to work with.
We had one good crop of real test match quality batsmen in Cook, Strauss,Bell,KP, Trescothick,Vaughan,Trott.
Since then only really Root,and the rest are mediocre,with flashes of brilliance or good seasons. Plus there is chopping and changing again like in the 90's
Harrison has a lot to answer for I reckon.