1) The question is about this road
https://osmcha.org/changesets/157111365?filters=%7B%22users%22%3A%5B%7B%22label%22%3A%22EdnaV%22%2C%22value%22%3A%22EdnaV%22%7D%5D%2C%22date__gte%22%3A%5B%7B%22label%22%3A%22%22%2C%22value%22%3A%22%22%7D%5D%7D

the southern part was completely erased, but I guess it's still there at least partially.

2) Thanks for clearing this up, that there indeed are signs. (Though just "eramaa" sign doesn't forbid cyclists and pedestrians by itself). Still, a road is a road and map should reflect this. You should not delete it. We should just tag it as private. Different tags can be added to show how well maintained it is. See wiki for surface and grade.

5) I see that you are adding a track besides the road. I don't see it on aerial imagery. Is it there in reality?

https://www.openstreetmap.org/way/1319289551#map=16/58.02593/26.39754

6) What's the source for the bicycle route being redirected there? Are there signs or any other data source? I think if the route is not maintained enough - it goes through roads where access was forbidden and there is no info on the internet, we should just remove it from at least those roads, but not invent a new route.