In the current Route you drive on the regional route to Gemünden (right). How about extending the Route and drive the left side via Rohrbach to Würzburg over a part of the High-speed rail Fulda Würzburg.
I'm honest, when all routes from preserved collection will be release, i prefer if DTG will works on exentions of theese routes. An exetention can take more service, more locos that can be add and more shutting and freight services with excenge. In MSN after an exended the ice and ic services can be added without problem and a freight Hub will be perfect. It is just an exemple. Honestly i think that just 1 "new" route per year and a lot of extention and locos will be great