Good thoughts and pics guyver.
In addition to what you mention, I like the shadow - like references to other Sith designs, even one's that have been erased from the EU, like Revan or Nihilus. There's a dash of Maul in that silhouette too. We'll never know how much of that was intentional in the design (Abrams is only on record saying they were trying to evoke Vader, but there is much more going on in this design than that).
The design helps sell the idea that Kylo was truly a student of the dark side...and not just the Sith. Really hoping the next chapter gives us a little more on the Knights (or Brotherhood) of Ren....
...All things that come to the surface while viewing and posing this great figure.