Hey thanks Don, Fess. I'd aim for a deck that handles and plays well first up, but foil backs and gilding might be options for a limited run. Yet to handle a foil back or inspect the quality, but should have one shortly.
I'm really tempted to do the full body courts, perhaps more faithful to the originals. Not sure how easy that would be to fund alone, but could possibly make a nice supplement to this deck.
There is a small trend to make cards with full-body courts - as long as they have two opposed indices, they're perfectly playable. The artistic value of such a deck would certainly help get it funded, I'm sure - people love a beautiful card, and done well, full-body courts can be quite beautiful. Based on the art you're showing us here, I think full-body courts in this deck would look awesome.
But if you were worried about getting it funded...what stops you from going both ways? (hee hee hee)
You could make the deck in the standard, modern form, with double-headed courts, if you were concerned about getting it funded. But as either an add-on-stretch goal, etc., you could make a set of additional cards that could be used as swappable cards - full-body courts, Aces with full-sized ornate pips, etc.
There's sort of a precedent for this with the Phoenix deck - the standard issue deck in red and blue comes with a single Joker and three extra Aces (diamonds, clubs and hearts) with oversized pips on the same scale as the Ace of Spades. The deck was designed for magicians and the designer felt that the large-pip versions would be popular because they're more visual, but didn't want to alienate any magicians who didn't prefer them, so both versions come in every deck.
Now, you likely wouldn't be able to offer a full set in every deck, but you could offer the extra cards. You could even make an oversized box to go with them, something along the lines of the Arcane Tarot/Poker deck - it's a poker deck offered in black and white, with a third deck of all the extra cards needed to convert a black deck and a white deck into tarot decks, plus there's an oversized box available made to hold each deck with the extra cards as a tarot deck.
It's something to consider. But even if you don't want to go to such an extreme, you could easily make full-figure courts and the deck would be popular enough that you'd succeed with it on Kickstarter. You have a solid following from the original Origins deck - you're not likely to scare them away with full-figure courts!