U talking data in % as seems u gt booking & boarding change details provided dedicatedly by IR/irctc!!!
I didn't tagged Awadh been priority choice for Mumbai goers but most station u mentioned are past ST towards Mumbai only!!
No doubt Awadh been fully loaded Bt again its nt a train to start frm GKP daily, Bt GKP serve intermediate station few days, alike ST along with many such trains!!
If...
more... GKP-ST end to end would hav been so heavy in demand, same would get reflexed in booking for Udhna/ST bound trains fem Bihar/BSB..thats y i mentioned less demand rather then nill demand..against ur NER/LKO no demand tagline!!