Aisa proposal aaya hai, but ALD HQ has not given clearance yet. Indore Barielly, pehle hi Agra Jhansi jaise bade stations ko touch karti hai running via etawah would be a probable loss.
I agree in the beginning Sushasan Express was meant to run via etawah but because of Construction it wasn't possible. May now Gwaliorites are happy with this route and they don't want etawah.