No Imran Nazir is a big loss for Pakistan, not too sure about Naved being a big loss these days. Razzaq's a big loss too, as is Farhat. Don't really rate Butt at T20, don't know who'll open with him either. Their bowling will be very strong though with Afridi, Tanvir and Gul. They're not as strong as last time, but will still probably win this group with ease.
England will be better than last time but don't expect win many more games. Their bowling is incredibly hittable at the top and at the death, in the middle overs in English conditions they might be decent. Batting basically lacks firepower throughout, Bopara may have improved but he's still no Sehwag, Warner, Smith, Gayle or Jayasuriya. Pietersen is still floundering in this format and hasn't really shown any signs of improving, I reckon Shah will be their top scorer for the tournament, Prior will be way out of his depth against the top sides.
Netherlands, Nannes is overrated IMO, RTD can't do that much, 2 losses, might damage the reputations of a few english batsmen in the opening game.