It's Simple.!! If MPS is reduced then priority will be also reduced. (This is followed in PRYJ Div Alteast :D).
Yes, This Spring Broken problem is really disgusting. I remember, Once 02816 NandanKanan got this issue in its starting 300 Kms of run.. 60 MPS was given to it till destination, nd it got whooping 14 Hours Late at Puri :D.
I pray, this incident should never happen with a premium class train, otherwise full Paise Barbaad..!! ЁЯШВ