I think that this will be fantastic in ts2019.The quick drive option only let you go from a station A to station B and you don't stop in other stations.Please add services.Thanks
You can get more from the workshop or make your own in the builder. There are also scenario packs out there from 3rd parties like Armstrong Powerhouse, DPSimulations, UKTrainSim and a load of others. Many require additional content but that's usually to add variety of AI, and you can always F2 continue past the missing consist errors and still play the scenario successfully (unless the consist you're missing is the one you're supposed to drive)
You can get whole ROUTES from 3rd parties (note usually huge list of additional requirements) so don't think you're limited to the steam store. https://forums.dovetailgames.com/threads/third-party-repository.3548/