All opinions welcome. I have had the hardest time with white balance lately. It's much deeper than it looks.
I have no idea what your coin looks like in hand. But where the raw photography has problems, you can often overcome that with software. Your original photo appears overlight, oversaturated, and lacks contrast. You can change that with some different camera settings and changing the position of your lights. I've briefly played around with your picture in GIMP. Does this look closer?
A bit more luster. Depth fairly par. I have tried a few after market programs in the past but didn't like my editing. I quit photo'ing for about a year, didn't keep up with practice.
Honestly, whenever I really like a very useful program... it gets discontinued. I liked Picasa because it was a great balance of features but not complex (the auto-contrast was exactly what I needed, but it offered a manual mode to tweak particular coins). I liked ICE because it let me stitch panoramas together easily. Both have now died. I have absolutely no use for 98% of the features of GIMP, but that seems to be what I'm stuck with.
That’s a nice looking Peace Dollar and it’s not a date that you see very often. I think you did good even at the price you paid.