Two relatively simple things which I believe would significantly increase the usability of this template:
Be able to specify which layers from my web map are included in the summary panel. At the moment it just assumes that you want to be able to show results for every layer in the map, whereas some of them such as a boundary layer are really only there as a visual reference so I'd like them to be drawn at all times.
Allow the option for the buffer distance to be consistent across all layers. At the moment if a user adjusts the search distance for the first layer, it resets back to the default once they move on to the next layer. They have to keep resetting the distance for each new layer that they look at. I'd like the user to be able to set it once and then be automatically applied to all layers.