I agree, I don't think Gold would fit this deck so well. I still feel pretty good about the red foil sticking out on the Red Vellum paper. I also think the detail of the back embossing is going to look fantastic (if the stretch goal is met).
Of the 683 backers so far I've only been contacted (either messages or comments) by about 5 or so people asking to see more Imps on the face cards. I spent a lot of time early in the year trying to figure out if I should add them all over or keep the deck clean. I ultimately wanted to preserve the overall integrity of the concept...adding Imps all over would have "themed it up" too much and made it look cheesy (in my opinion). Additionally, this is not, and never was, intended to be an art deck. There are many other beautifully designed art decks available on KS to back. In the future I'd love to create an art deck around the Imps, but having a background in magic and being that the inspiration came from a magic poster it only seemed fitting to design the deck for functional and practical use...but remain aesthetically pleasing to the art community.
Oh yes @Collector, the Gaff ideas for this deck are endless...I could put one more in the deck if I remove a Joker (Imp) but I don't think that would please too many people.