So I'm new to OSM, but this update seems strange to me. Is it work in progress?
The data this change imports seems outdated and/or inaccurate.
It looks really rough compared to how the woods looks in imagery, or even in Kartverkets maps!
I've spent some time improving the woods around Hana, but this update reverts that! 
Here's a few examples:
- The woods now cover houses/roads in the area around 58.862152,5.762039
- This way used to "cut out" part of the woods, but now it's not connected to anything: https://www.openstreetmap.org/way/284293997
- I also noticed that some details are lost around Dalsnuten, for example here: 58.8891851,5.8080313
- Coastline around 58.878884,5.771985 seems messed up too?