I don't know know who fully reads the OP's for these seasonal threads. I do know, however, that there are always people new to anime who come into these threads looking for advice. There's also plenty of people in Off-Topic also looking for the same kind of advice. Therefore, it seemed logical to collate useful information into one easy to use post. Even if people don't read it in the OP they can link to it, or copy it into, those endless "Recommend me a show" threads in Off-Topic.
I suppose what it boils down to is what purpose does this thread serve?
If these threads exist solely to feature nothing but relatively disposable impressions of currently airing anime then perhaps there's not much point in trying to pitch the threads as a 'Reference Centre' for anime fans because that requires some work.
Alternatively, the NeoGAF anime community might want to look at preserving it's heritage, whether that's specific threads, or insightful posts, or whatever, in a manner that's clear and visible to newcomers. This would ensure that there's actually content in the thread that's relatively timeless.
I don't know what people want to do with, or what they are looking to get out of, the thread. I certainly don't share the same tastes, or have interesting in writing the same kind of content, as say cajunator or Cornbread79 or whoever. Which is perfectly fine. It's up to those seriously committed, very prolific commentators to set the tone and message for these threads as they see fit.
As stump showed with his stats, it seems like this community is relatively healthy, in that it features reliable older members as well as plenty of newer commenter's. As long as people with a diversity of tastes and opinions, who are able to help others, continue to post here then this thread will still have a purpose for some time to come.