more over , it will take minimum 45min to go VSKP and join back in main line again which includes reversal/crew change/water filling and all the stuff that happens in this meantime...VZM was given a 10min halt when it was skipping VSKP so that water filling and other stuff can be done...and at that time, you don't have these many stops between VZM-BZA...not halts got added, and additional burden of 45min in terms of operations to go inside and come back to join main line which obviously adds to the wound ..
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also...
more... in general , for every halt , even thought trains halts just 1/2 min in stations, it takes 10min min in a overall fashion to enter and exit station including halt time...if we count all of that then current schedule is tooo tight to maintain such a aggressive speeds now..because more trains are keep getting added..freight traffic and then passengers ..i don't think this will change even after getting a 3rd line or 4th line between VSKP-BZA ...may be they are going to give a parallel run in stretches but when it comes to arrivals , the pattern will go on ...