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I did an install today, and I chose my desktop environment. On the right side, there were a whole bunch of checkboxes. All of those checkboxes were unchecked. Some of the items didn't make sense to be in the list at all (like "Base"). My opinion is that the stuff that gets dragged in automatically should have a checkmark by it, be insensitive, or be pruned from the list.
Are you still seeing this with the beta?
Snapshot 2 appears to prune default items from the Add-On list, so it only shows unchecked items you can select. http://download.eng.rdu2.redhat.com/rel-eng/RHEL-7.0-20140108.0/compose/Server/x86_64/os/