Fes raises a good point about clarity of the indices. The more playable a deck is, even if it's an art deck, the more likely people will buy it, pick it up and use it. I would go as far as revamping the index pips to something more standard, while reserving the custom pip designs for the card art itself. Or, if you go the "telling a story on the spot cards" route, you might find yourself ditching most of the pips in the first place, saving a few for the courts and that's about it.
Clean design is key. Consider ditching the watermarks and going for a plain back, perhaps a background for the courts.
And you need a TITLE for this thing! What kind of title is "Gothic Horror Industrial Punk?" You've given your work a generic name, no better than the no-name brand cereals and colas in the supermarket - they never taste as good as the name brands so people tend to pass them over. You have a story, give it a title, because I don't know too many people that would buy a book called "Gothic Industrial Horror Punk," even if that was their favorite genre.
If you want to save a few bucks, consider ditching the Bicycle branding and consider a few of the other printer options out there. Expert PCC and Legends PCC both make quality decks for less - some would say better quality. EPCC is a decent alternative if you have to go on the really cheap, but you'll run into resistance on pricing - dyed-in-the-wool collectors won't pay a lot for an MPC deck because their printing process isn't as good; they use a digital press that tends to make the art darker and doesn't have the same resolution as an offset press.
Want to attract collectors? Bells and whistles can often work. Embossing, foil, metallic inks, foil printed directly on the cards, UV ink, custom deck seals, serially-numbered deck seals, fancy wooden collector boxes - you name it, sky's the limit. Don't go too crazy on the extra items like coins and dice and such - they can be popular, but you don't want to turn your project into a bazaar and they tend to eat into your profit margin more, especially if you get out of hand and offer a LOT of stuff. And lest you forget, everything you offer, you have to ship, and shipping on the low end of the pricing scale still goes by weight.
Best way to introduce the extras is as stretch goals. The more money you raise, the more stuff you'll add to the deck. But don't add just for the sake of having bells and whistles - make sure that what you're adding actually fits with the design aesthetic you've created for the cards.
I don't see the Illuminated version of the deck doing too well to improve the bottom line - you added a few bits of color here and there and some splotches like you spilled motor oil on the cards. Doesn't scream "premium product" to me. Just make a FULL COLOR version of the artwork, one deck - having a single deck at least at the start will help insure your success. Double-deck projects that start off with two decks need some serious following to get the needed momentum - if you were a "rock star" deck designer, that would work, but you aren't, no one knows you or your work, so be less ambitious and perhaps work a second version of the deck into a stretch goal. Making the initial goal smaller makes the whole project more affordable, as long as you're properly budgeting for everything - and a smaller goal is more easily achieved, giving you success and making your brand known. And if you do go for a second version, make it really special somehow, not with greasy blobs but with something classy - metallic inks, foil on the cards, etc. Imagine you're in the "steampunk" era - Victorian England. Would a gentleman of wealth from that era prefer a more refined and elegant design, or something that looks like a grease-stained mess?