If you are referring to schedule then while designing the schedule for 12133/34 railways must have done some research after that only schedule was designed for the latter.... & SuperFast trains should be giver priority over Mail exp trains after all They are charging extra for the particular service....
And you are stressing on KR Operationality then let me tell you that other trains have slack available in their schedule due to which they cover up the Delay....
& one Last thing why only 12133/34 has avg delay of 5 hrs...
more... why other trains operating on KR have no such delays.... Chalo.... Let's consider the slack option for other trains even 12051/22119 have very less slack in their schedule & less TAT but still they maintain their schedule they don't run horribly late... How is this possible will you explain?