It would be nice to have more information in the backend interfaces of Attributes and Attributes Groups, see attached screenshots.
In the Attributes interface it would be nice to have a Attribute Group filter, so it's becomes very easy to view all attributes assigned to a Attribute Group. At the moment that is not easy to see, since the column Attribute Group can not be sorted.
In the Attribute Groups interface it would be nice to see some information about the number of assigned attributes, as we can see in the Joomla Categories view (# of publised, unpublished, etc. articles).