I find some of the patterning in some of the cards to be unusual, for example the 6. To me it would surely be more natural to put the coins in two straight lines of 3 (much like the 8). So why this pattern?
It seems to me that alot of thought was put into the foliage of this suit and not just the coin patterns, which direction it should take, like the foliage gives the meaning. For sixes, my immediate thought it choices and decisions, so the here we have the directional cross in the middle and also the foliage saying: "this one, or this one?"(top and bottom coins). Something similar could have been done with two columns but it would not have picked out two individuals coins perhaps.