Roy,
I agree with you on that, Afridi and Razzak can prove to be costly and Saqlain, a top onedayer bowler, would be a far better option.However, if Pak goes with 5 specialists bowlers, then their batting would be weak, as has often been the case.
Afridi isn't a stable opener, and with Razzak comming at one down slot, Pak might end up losing quick wkts, and the pressure will then be on Yousuf and Inzi.In my opinion the onedown slot is very important position, Misbah comming at one down slot would provide lot of stability to the batting line up, and with Yousuf/Inzi and Youhanna to follow Pak would be in a better position to put up a good score.
I guess its all a matter of one's priorities, Pak for one always put the emphasis on the bowlers!