There are various people who feel that Lesswrong degraded in the last year. In the same timeframe more and more discussions moved into the open thread model and open threads became weekly instead of monthly.
I suggest to counteract that trend by opening all discussions per default on Discussion instead of opening them in weekly open threads. Having the topics in discussion makes it easy to browse the list of topics and choose the headline that are of interest, even if the thread got opened two weeks ago.
This is something like the third time I've joined a community that seemed to think it was in decline. I have a theory: they were, and it is, and this is something I should expect.
Reasoning: A high-quality community will probably grow over time as new users discover it. As it grows, the quality of its user base will inevitably regress to the mean (i.e. decline). More people will experience the community during and after growth than before growth. Therefore, assuming I am a random community member, I should expect the community to be in decline during my tenure.
One could probably do some amusing math by taking growth rate at time T as a function of quality and population at T-1, and quality at time T as a function of quality at T-1 and population change between T and T-1. There is probably a word for that sort of setup but I don't know it.
This is the Doomsday argument.