@ivanrogov - I'm trying to figure out what the "1010" is in the top right corner and visa versa.
The original deck concept included binary numbers in the corners that aren't indices to represent the value and suit. "1010" in binary is 10 in decimal.
Recent changes to the deck. Mostly refining the 10 card at the moment.
I think you've swung the pendulum too far in the other direction! The pips are fine, but the background looks a tad plain. Perhaps a little more of something is in order, such as Magasaki suggested about using more map types. Put some grid lines on your maps. Get closer - we're seeing a multi-continental scale here, but why not smaller? Show nations, pick current maps, pick historical maps, etc. - but use the updated "digital map" style of presenting them. In fact, your maps need not even conform to a real-world location.
Ever look at a Google Map when you're searching for something a little generic, like "restaurants" or "drug stores"? All these little markers drop from the sky and land on your map, and touching each one causes a window to pop open with the details of that particular restaurant or drug store. Picture this - you can use traditional or non-traditional pip arrangements, but what if the pips were a bit smaller, and used as part of the map's features? Instead of a bunch of restaurant names, you could provide "coded data", such as four alphanumeric characters, to label each point, things like "F46T", "E3W2", "0L6G", "DSN8" and so on, with each pip being a marker with one of those labels. Use the same font as the indices, maybe provide a label for the map similarly encoded, and you'll have something that looks a lot like a military, scientific or government digital map. I think it would provide a cool effect.
I like the size of the index - but I also tend to like smaller indices. Try somewhere between 25-50% larger and see what looks better. It a matter of finding that sweet spot for the size, small enough to not be unwieldy, large enough to not require reading glasses.
Your binary numbers are only showing the value. Try this format:
0000.00
To the left of the decimal is the value, to the right of the decimal is the suit. Assign numbers to the suits - perhaps something like 01 for spades, 10 for hearts, 11 for clubs and 00 for diamonds. For me, it's natural to use those numbers - spades have one point, hearts have two "lobes", clubs have three lobes and diamonds have four points. As you can't make 4 without an extra digit in decimal, diamonds get 00 instead of 100. Also, you have just the right amount of digits; not too many nor too few.
A King of Clubs would be the largest number: 1101.11
An Ace of Diamonds would be the smallest: 0001.00
Seven of Spades: 0111.01
Eight of Hearts: 1000.10
etc.
If you wanted to be very clever, you could use this same system to create a marking system for the card backs - but if you were to make a marked version, I'd make it a stretch-goal add-on rather than the main product. Many card players will not touch a marked deck or a one-way back.