I think the chunky dithering looks good here!
Have you tried an option where the reflection uses darker gold colours?
Here is an edit with a darker gold reflection:
I also made the reflections a little more accurate by putting the lighter colours closer to the gold surface (so, above in the reflection), since the sides of the letters have their lightest colours closer to the gold surface.
I got a bit carried away and played around with it, too:
- Fixed the banding on the edges of the gold
- AAed "VI" just as an example of what the text might look like AAed. I think it looks nice, but the sharp pixels have their charm too.
- Reduced some redundant colours in your original gold plate. There are still some colours that are indistinguishable at 1x, so there's more colour reduction you could do.
- Probably made all the gold colours a bit too saturated xP