To me that is a big blunder Pakistan has made. 
1. we had to take 20 wickets, to get back in series
2. same bowlers have played all series, they would have been tired also
3. we had taken such a large squad, surely 1 bowler no matter which proper bowler, batting all rounder, bowling all rounder, etc, could have been played.
4. alternatively Nasim could have been replaced with bowling all rounder type bowler (e.g. sohail khan, twice performed well in practice games, same games played by rest of bowlers), and Fawad or Asad replaced with Shadab.
5. playing 5 bowlers doesn't just add more to your arsenal but it actually helps improve performance of rest of 4 bowlers as they have to bowl less often, shorter spells, faster pace, etc.

1. we had to take 20 wickets, to get back in series
2. same bowlers have played all series, they would have been tired also
3. we had taken such a large squad, surely 1 bowler no matter which proper bowler, batting all rounder, bowling all rounder, etc, could have been played.
4. alternatively Nasim could have been replaced with bowling all rounder type bowler (e.g. sohail khan, twice performed well in practice games, same games played by rest of bowlers), and Fawad or Asad replaced with Shadab.
5. playing 5 bowlers doesn't just add more to your arsenal but it actually helps improve performance of rest of 4 bowlers as they have to bowl less often, shorter spells, faster pace, etc.
