1 pointThere doesn't appear to be a native way to do this, but if you write a VIM for this then you should be able to reuse that on any map type.
1 pointThe official VIs are different implementations. I imagine they're faster, since their implementation is simpler (they just wrap Spreadsheet String to Array and Array to Spreadsheet String). Also the new VIs have the standard connector pane and official icons. You shouldn't have any issue continuing to use the hidden gems if you prefer those.