That's how the scenery is supposed to look like: that's not a runway, there are no markings and there are taxi markings and signs so it is a taxiway.
If you check Google Maps, the image that is there looks even more runway-ish than the one we have here, since you can still see the markings there and the Xs indicating a closed runway, but with taxi lines on top.
Yes, the image on Google maps is a bit outdated, but until it is, we didn't want to do something too different, that users using Google maps for comparison might assume is wrong so, instead of making "totally taxi" ( without any reference ) or leaving "mostly runway-ish", like in Google Maps, we choose something in between.
