I watched a presentation by Tobias at some convention they went into how they developed the game that they did, especially the atmosphere, and how they used old art depicting things like the plague for inspiration.
What is incredible is how well its aged, and you don't need the miniatures of the day or anything else but the rulebook to play.
I am not good at making my own terrain, so when I see custom medieval buildings and game boards I am usually in awe. I've only played mostly using the terrain that comes in the box set, which I admit I do still like and are happy with.
I do think GW's best work is years behind us as far as games are concerned. There are so many classics I just refuse to get rid of, and still get goose bumps when I open the starter sets.