Our company is using Categories as a taxonomy structure. Only the DGO can create categories, but everyone else should be able to view all the categories with out needing to do a search on an Information Asset. That allows easy access to data domain specific information that would benefit individual groups within the company. We just don't want them to be able to add new categories but the icon should be there so they can easily see the categories available.
We are currently working through a UI update to the Knowledge Tier and will look to include the read only capability back in so that Viewers and Authors can see the full category structure. We are also looking to improve the director dashboard landing area by replacing this with our new embedded dashboard capability. We can look to include category information on those pages also.