Thanks for this idea. While we're not in the process of creating a feature "select A B or C road" since that's far too specific, we are indeed creating an improved route generator with our own novel insights into this matter. We're standing on the shoulders of giants here and have a good grasp of what it is that you'd most likely want to avoid, however, region-specific information is always useful. This afternoon I have a creative meeting with the developer in charge of this project and i'll be sure to mention how this is handled in the UK.
It's for certain that we don't want you to drive an awful route through blocks of appartment buildings because that route would technically be "very curvy 😁 "