I like the artwork and the whimsy of the design - they should be a huge hit with the Ren-faire crowd as well as fans of art decks.
If you want a broader audience...
First - make the back into a two-way design. It wouldn't be hard to slightly alter what you have now and make it a two-way pattern with rotational symmetry. Many collectors prefer two-way designs and poker players, even casual ones, won't touch a one-way design - they can be used for cheating.
Second - I know you probably can't lower your price, but $15 for an MPC deck is pretty high. The Ghost deck seems terribly expensive as well, considering that there's nothing aside from rarity to signal the need for the higher price - at least the Gold deck has premium features in its manufacture. Consider setting a stretch goal for a higher-grade manufacturer, such as Expert PCC or Legends PCC, at the very least for the base-model deck - if the goal is reasonable, you'll find collectors will be more interested.
Third - it is EXCEPTIONALLY ambitious to launch three wholly-different decks in a single campaign right off the bat. If the campaign doesn't succeed, consider retooling the campaign by offering one deck from a high-grade printer at a decent price, then offer decks #2 and #3 as stretch goals. I know that using MPC does make it easier to offer multiple decks, but MPC, while good, isn't $15-a-deck good to a lot of collectors, never mind the higher prices.
I'm available for consulting at reasonably low rates if you want further advice and suggestions. I've worked with a few successful deck producers in the past.