Wowowowow!
SpaceEngineer this is awesome. This model should definitely be part of the Solar System HD official addon. Such a beautifull vista!
Only from the screenshots I can see Alexander's gate, Deir el-Medina, Hatmehit (where Philae was supposed to land) or Aswan (a cliff that collapsed during the Rosetta mission). It's amazing. A world to explore in SE for sure.
The only thing that looks unrealistic to me is the self-shadowing issue. I imagine that if this is archived the SE panorama would be similar to that on the ESA's video.
The comet is indeed very dark. The majority of pictures taken by Rosetta had longer exposures than one would expect.