There is no option to filter by Tags when adding content to a Workspace. As we use tags to manage and allocate our data this is a feature that is sorely needed and which is a major blocker to using Workspaces as effectively as we would like to.
There is also no option to add to workspaces in bulk from the Datasets or Dataflows listings so they have to be added individually which is painful when there can be 100+ elements that need to be added.
Please give us these options asap.
Thanks