As you can see in the changeset source I was using the aerial imagery to verify each and every single one of all the objects that I changed. There wasn't anything "mechanical" about this edit. 

You can't claim that I added any mistakes to the map here, because the water bodies weren't part of the multipolygons in the first place. As I mentioned previously, this can still easily be done. I just don't happen to have my pc with me this week.

I did notice the slope tag, but since I have no idea what the tag means I didn't do anything with it.