A couple of things. First, I only just noticed you've a) made a new topic for the same deck and b) posted it in the wrong board - Deck Reviews! is for decks that have ALREADY BEEN MADE, not ones people are still working on, and furthermore they go there when a CUSTOMER is reviewing them, not a CREATOR.
I've fixed all of the above.
Now, Cardlover, to you design...
You've modeled the multi-index design off of the Modiano Poker Peek, which is itself modeled after the USPC Bicycle Poker Peek. USPC's design TANKED at the World Series of Poker, to the point that the players forced the venue to swap out the decks. Too many players were confusing jumbo-index 6s and jumbo-index 9s for each other.
If you want that doodad in the design to look like a Treasury seal, then make it really look like a Treasury seal. What you have now looks NOTHING like a Treasury seal.
Regarding what the professional bridge player told you - IGNORE IT. Sure, it's great to have four indices for better visibility. But professional bridge players general don't use a poker-sized deck because of the number of cards they have to hold at once at the start of the game - each player is holding a quarter of the deck, 13 cards. It's why bridge decks are more narrow.
Another thing to bear in mind is that while some people will love the extra index, there are others who hate four-index decks with a passion. Some might argue that it's bigotry against left-handed people (they're estimated to make up only 10% of the global population), some are so locked in their minds as to what a playing card should and shouldn't have that the four indices causes their mental engines to seize for lack of oil and some are concerned that when holding a hand of cards, the extra index might get accidentally flashed to an opposing player when they catch a glimpse of what might normally be an empty corner. Boiled down to brass tacks, there are some players who love them, there are some players who hate them with a passion. I suggested you make them smaller because of those who could complain about the accidental flash. It keeps them functional for lefties, though smaller than a standard index, and can be used for a discreet peek at one's own hand at a game such as Texas Hold 'Em.
A pro poker player wouldn't use a deck like this in first place; not a hardcore, dyed-in-the-wool, casino-style player, anyway. They use what nearly all casinos today use - standard index, standard faces, bridge-sized plastic decks. The plastic tolerates wear better and doesn't crimp or nick as easily. But a casual player might break this out, if he really liked US Presidents.
Make your design not based on what a poker player or a bridge player wants or the person with poor vision wants. Base your design on what YOU want and what you believe the audience you're selling to wants. Collectors are your primary audience, to be sure, but not your only audience - for example, US history buffs might find your deck intriguing, but that's not because of how well or poorly the deck works at the poker table. They're more interested in gorgeous artwork of their favorite subjects and having as little as possible get in the way of that artwork.
Don't depend exclusively on the collector market to carry your deck to success - if you look at the highest-grossing decks out there, none made it on ordinary deck collectors alone. They pulled in people that ordinarily wouldn't shell out ten or fifteen dollars for a pack of cards, but fell in love with some aspect of the project that made it easier for them to part with the money. They could have been artists or art fans (Uusi decks have a good following with the art world), they could have been fans of the movie ("The Princess Bride" decks from Albino Dragon, "Star Wars" decks from Cartamundi), book ("The Name of the Wind" deck also from AB, the most successful deck project on KS to date) or TV show ("Firefly" decks, "Breaking Bad" decks, etc.). They might love nostalgic design (the Hornets deck from now-defunct Circle City Cards is a fine example of this). Reach out further, but don't forget your focus.
