Suggestions...
Show more of your art work.
Insure that each deck has unique court cards in every suit. If possible and within your aesthetic, consider employing standard court card appearance, such as the King of Hearts, a.k.a. the "Suicide King", having a sword pointed toward his head (it's actually behind the head, but some people thought it was stuck into his head, hence the nickname), making the King of Diamonds and the Jacks of Spades and Hearts "one-eyed" (seen in profile), the Queen of Spades holding a scepter (the "Bedpost Queen"), etc. Sounds silly, but many card players, especially neighborhood poker, use these appearance-based nicknames when playing to identify wild cards.
Try a more attractive tuck box design. The uniform style you've chosen seems a bit too bland. Not every deck must look like a pack of Bicycles or Bees, but a single face card image in a gray frame doesn't really get the heart racing and the juices flowing, if you catch my meaning. You can make them united in appearance by giving them a design on the sides of the cards that identifies the artist and the Amigos Card Club.
A three-deck project from a new deck design group may have been a bit too ambitious. Perhaps start with one, then make the others as either stretch goals or individual projects. I've seen some excellent projects languish and die because they were overly ambitious.
As much as I hate seeing a card project devolve into a Middle-Eastern bazaar, perhaps offering just a few of the most popular extras as add-ons to your project would help. Some very popular ones these days are uncut sheets (offer in small supply to spark more interest from collectors), posters (for people who can't afford the uncut sheets or were too late to get them), coins, poker chips (offered in small "one-each" sets for cheap and in full-blown poker kits for the more excited backer) and T-shirts (not too many designs, just two or three tops, and make them "iconic"). Custom dice were popular for a while, but they've fallen out of vogue it would seem, as fewer projects are offering them now.
Need more? Hire me! I do consulting work for designers and I live in the five boroughs. In fact, every third Thursday of the month I'm in Brooklyn performing for kids at a hospital in Park Slope. My rates are cheap because I'm in it more for the fun than the cash - which is good, 'cause I don't make a lot of cash at it! My biggest client to date is Uusi, from Chicago (who have heard of you, by the way) - I started working with them on their second deck, Bohemia, and each deck since. Their last design is coming to Kickstarter in a short while but there's already a topic about it here -
Uusi Classic.