First of all....let express trainsrun as express trains first and let the basic infrastructure get expanded........
A Shatabdi / Tejas can be experimented once
1 . Entire KYJ - ERS (via ALLP / KTYM ) doubling gets completed
2 . Automatic signalling system comes over
3...
more... . Quadruppling / Tripling of ERS - SRR line
and most importantly the entire track renewal process has not yet completed so that also has to be considered