Hello,
Thank you for the two improvements that you suggested. Unfortunately, the plugin cannot currently do these things.
For displaying the [wallets_balance] shortcode in an alternate fashion, what is required is a different knockout template. There are instructions in the manual on how you can provide a different directory with knockout templates. I would imagine that it will involve the foreach binding, to iterate over the coins() observable.
For your second suggestion, this is not possible at the moment. At some point in the future, I will allow shortcodes to take optional arguments, and then you will be able to specify a coin or other constraints on what is displayed. This is a big task and I cannot do it at this time.
kind regards