Just some idea from some days ago. Currently all Numista members have the same color of the bubble on the swap map:
I guess it would be (just for starters) nice to have color distinction between members that have zero and more-than-one "piece" that may interest me. If colors are no go, maybe a nice addition would be the number of coins and tokens and paper money that would interest me.
When number of coins that may interest me of certain member is zero, most of users would probably not go forward and check available pieces to swap.
I guess also the column headers "Coins that may interest me*" and "Coins that may interest him/her*" should be changed, as today not only coins are the main focus of Numista. Headers should be more general in case the numbers also represent tokens and paper money.
LP