We believe class:bicycle is invitable to get good routing results. Exaclty as you described your expiences in Unterschleißheim. Importent is a standardized or well described rating approach and a clear focus on the main target group, which are the less expierinced all day cylists. For other groups there are plenty of spezcial subtags. See https://www.munichways.de/berwertungskriterien-radwege/. There you can see that is not mainly about width. We first rated the main routes from north to south, east to west, etc. across the whole City, fococing on the very Bad and good ways. This alreafy improved quote a lot. Then we went departement by departement to complete.