I think the piece is great as a base for a larger piece of work. Honestly, the background is so blah that it takes away from the detail and drama of the construct. If you were to generate maybe an industrial/steampunk background or even something Skyrim/LOTR I think it would really complement the work.
Also, from a strictly mechanical standpoint, I think the bracers underneath what I can only assume is the focus of the piece, are too thin. It would probably add a lot of visual strength to the piece if you had sturdy bracers underneath it. It would cause the viewer to think "wow, that central spiky part must really be heavy duty. Look at all the bracing needed to keep it in place." Right now it looks like it could be made of carbon fibre or something else ligthweight.
Anyway, just my suggestions. I think its a great model nonetheless.