No need to get riled up. TKPR LLH is declared unfit for coaching services. Last year a joint SER-ER trial happened to check feasibility for EMU services but it failed. There is no plan of making it fit for coaching trains as well because any train towards HWH will have to block all 5 lines (Main Line Up, Mid, Dn and Chord Up, Dn) and that too near Howrah and that is a big no no.
It can go to Dankuni only if it goes to BWN straight from KWAE but...
more... even that route is cleared only for EMUs as of now