Hasnain hasnt made much of an impact whereas Shaheen has been hit around the park and has had only one good game on the basis of which he was preferred over Junaid. If one of Amir, Hassan or Wahab get injured, their replacement may not be adequate enough to replace them, I have concern! Junaid would have been a far better choice than Shaheen! Regarding Fahim, he is an allrounder naam ka hi sahi and when you would like to field 4 pacers in a particular situation, you can have an advantage with Hassan and Fahim both allrounders and then you can have Amir and Wahab and part timers Harris Sohail, Hafeez, Malik and Fakhar Zaman which would help them as it would extend their batting depth with Sarfraz walking in at 7!! I believe against India, you would require 4 pacers to be able to dent their batting!!