One thought of mine was for DTG to make the WCML between Crewe and Manchester. It would be the line through Holmes Chapel, Alderley Edge and Stockport, and then the Styal line with manchester airport too. The other half of the route would be the Liverpool to Manchester line via Chat Moss. Manchester needs more routes in train sim, and would be another gap filled in the WCML.
Might be worth posting in the Suggestions forum https://forums.dovetailgames.com/forums/suggestions.34/ Liverpool to Crewe is a Work in Progress by the people making the South Lancs - North Cheshire Freeware route and Liverpool to Victoria has already been made by them https://www.wotawallysbits.co.uk/liv-man-br-blue-route