Agreed. I would say that the way Pakistan cricket was going before the world cup they weren't capable of Semi Final spot but they proved everyone wrong.
I think Hafeez wanted to finish off the things as soon he could which lead to his downfall.
I would in particular blame Misbah and Younis because they were suppose to rotate the strike and just like Tendulkar (on most occasions) they failed to do it and pressure mounted on other side.
I think time has come for young faces, the wicket was not good for fast bowlers but Wahab Raiz proved everyone wrong, he bowled impressively considering the fact he was poor throughout the tournament. So Pakistan future does look bright if they bring up new faces.
Shafiq, Umar Akmal and Wahab clearly have shown there worth in ODI side. Wahab just need more coaching and training with coaches and he will became a great fast bowler in future if he lives up with his hardwork.
Junaid Khan is another good fast bowler, I saw him live in summer when I went to NCA and this boy looked impressive, pace, swing etc everything was there.
So yes, Kamran, Younis, Misbah and Razzaq will be dropped and should be dropped. Hammad Azam is a name that comes to my mind right away when I think of replacement allrounder and he is perfect man to replace Razzaq.