Thanks for your detailed response!
While reading your explanation, I remembered that there had been discussions about ‘too much staff’, long time ago…
Unfortunately devs didn’t make this clear - or did I miss it?
My bug reports about these issues (probably dozens of it, over the time) are NEVER worked on ("can not reproduce, duplicate, …) and I did not find any actual statemnet about these issues… Here no comments, too… 
EDIT: Another “nice” one:
Yes, these are all sidewalks… 
pax just do not want to walk shortest path…