BSB-ALD Main line hasnt got pole erected yet & i dunno about the electrification completion!!
As far as travel timing in between ASR-MGS via MB-BE-LKO-SLN-BSB Trunk route is concerned, nothing extra-ordinary will happen, until LKO-SLN-BSB Track is 100% doubled (its some 55% Double yet)
PS: Shramjeevi is mostly in-time or before while returning from NDLS to Rajgir @ LKO.
It get late for 1-2...
more... hours till SLN (Total 140 km from LKO, 75 km single traction).
LKO-BSB Stretch makes train late for 2-4 hours, if they get into single track @ conjested timing!!