Just an idea: a toggle switch somewhere that allows you to disengage/reengage sidewalks in Route Builder.
Reason: When zoomed out a bit and building routes, I find myself accidentally selecting sidewalks instead of streets. This isn’t always terrible, but it can make GPX files a mess later on.
If no one else has this problem, forget I mentioned it. Maybe I have have fat fingers and a crappy mouse. 
I have this problem all the time in my hometown, where sidewalks aren’t drawn if you zoom out far enough
But are drawn when you zoom in
I’ve worked around the issue by zooming in before dropping each point, then zooming back out to continue planning/building the route.
I’ll take some time to play with sidewalk_factor and see if that helps…
Update: Changing sidewalk_factor and walkway_factor to forcefully avoid those breaks routing quite frequently. I’m playing around with using auto instead of pedestrian along with options that will keep the route off highways etc…
Update: 
Using auto requires (obviously) a lot of customization (ignore one-ways, ignore certain restrictions, don’t use highways, etc). I’m pretty sure that if I release a version that switches from pedestrian to auto that I’ll be causing problems for lots of people as I work through figuring out more and more customizations that are required to keep things accurate/safe/sane.
I’m going to leave things as-is while I monitor feedback on this post.
Yes, I would categorize this feature request under strictly “would be nice” rather than “crucial.”
