Sir, Chennai has only 4 lhb trains, in that 2 ((MAS-MAQ), (MAS-MAQ Anuvrat Express)) has dedicated rake, other 2 has rake sharing ((1.Chozhan,Pandian, Rock Fort) 2. (Cheran and TVC mail).
Even Kerala region has also 4 lhb trains, ie Indore Kochuveli, Bikaner Kochuveli, TEN Bilaspur (Via TVC) {TVC Division} and Dharti Abha Express.
Yes, I accept Kerala Bound trains are pathetic, but they should also give equal treatment to Tamil Nadu, Even They should provide Lhbs to TN, GT , Navajeevan which are also over utilised coaches although...
more... it is CBC coupled rake
If SR starts giving importance to kerala region, they will not consider Tamil Nadu.