Have you left a review about the plugin you are talking about? Have you submitted your suggestion to plugin's developer? Each developer is responsible for his plugin's features he provides, not Oxwall team :)
RSS for groups functioning properly
The works is not the one I put in the title, not that's the problem but do not charge FEDS, algnas times published one story without title or link, if you allow posting the creator of the group but not be the group can post feds, when you manage the feds have no possible way back to the group and so I consider it an incomplete pluguin.
http://www.oxwall.org/forum/topic/26829
http://www.oxwall.org/forum/topic/13431
http://www.oxwall.org/forum/topic/13427
http://www.oxwall.org/forum/topic/9776
The only answer to this developer does not understand you...