The whole story can be read up here.
Shortly said: In the last months of 2012 the devs changed the guild renown decay system as a temporal fix. The change now lasts for more than 6 months. The old system favored more active players over less active and had a small upside for small guilds due to mathematical inconsistencies. The new system now grossly favors larger guilds (the more active players, the better) over smaller guilds based on sheer size alone.
Corresponding with the change the devs opened a new thread in the Official Turbine Discussions. They asked for player input and discussion. For about 6 months now there had been a lot of discussion. Based on the experiences from the change, the overwhelming majority of contributors in that thread now agrees that there should not be any guild renown decay at all. Several proposed solutions on changes and alternative systems were worked upon and many a good idea were posted. So there is a lot of stuff for the devs to work on. If they like to.
Several months ago there was a short statement that the devs are still pondering on the topic. Since then - silence. We, Turbines (paying) players, customers and and fan base even miss any hint on what the intended strategy with the whole system now is. We feel we deserve better than silence from Turbines part.
Therefore, a plead to all the contributors on this forum, please sign this petition:
We, the signees, herewith petition Turbine for the following: Please give us a more open communications policy regarding Guild Renown, Guild Renown Decay and Guild Renown Changes. At least please ether close the official discussion or give an update on what the Status of your planning is.