Shared datasets and ability to allow users to create new measures and reports and publish

There might be multiple users but generally the problem has been how to refresh the data from a dataset that has then been modified by others in that they've added their own columns or Dax measures etc. Users complain that they do not have rights to "slice and dice" the data when they download the dataset and I thought that was due to it being a "live connection" so they just needed to download and work on it within their own desktop but again then I'm thinking you have a refresh problem?