Mateusz Konieczny
Do you think that would be a good idea for me (complete outsider and with extremely limited local knowledge) to start such discussion?

I suspect that answer is "no".

Though I want to register that seems to be an significant inflation of road classification and problematic mapping.

Looking at https://www.openstreetmap.org/note/3111223#map=12/44.3452/-81.1337 - this should not look like this