1) I'd like to see a preview of all the layers in Open Data in the Web App Builder Add Data widget. With thumbnails and descriptions like in My Content but for Open Data Groups.
2) You can add one group at a time by using the Curated filter. It would be helpful to be able to add multiple Curated groups. For example I can add Environment but then no other groups to it. Plus, it adds ALL the Environment layers at once and doesn't provide a nice list with thumbnails to page through, unlike how it works for My Content or ArcGIS modes in Add Data. It would be nice to 'see' and load layers from Open Data in the Add Data widget like those other two categories, effectively linking Open Data to Web App Builder sites.