Looks epic. I love the studding around the edges of some of the lines, gives it that old feeling. The shading is nice too, but since your light source is top left, you could have more shadows on the bottom right. Sorry, I know it's a WIP.
Did an edit of Mercy's ACR from Era PC. Here's a side by side comparison, mines at the top. I didn't change that much since I really liked it but added a few details and cleaned up the shading.