Discussion about the metagame does not help tier list placings. It may or may not help players who participate in tourneys, and that is what matters. Tier lists do not ever take into account "______ can do this, or has a chance of doing that, or is capable of doing this" - no. Tier lists are strictly based on tournament placings, and how often the character is used/places in tourneys. Look at MK, for example. He has almost next to no AT's whatsoever. Look at his tourney placings. Now look at Link. He has a far, more advanced metagame than MK does, he's practically broken in the AT category. Look at his tourney placings and his tier list position.
And it's better to have a metagame discussion all concentrated in one place, actually. I know it seems like "more discussions = more possible findings" except that a lot of 'discoveries' tend to be really old, and it's better for the more experienced Links to be able to explain why ___ and ____ does and does not work. That's why congregating to a single location would actually help Link's game more. What's the point of the SWF-only people right now discussing stuff the AiB people discussed last June? There is none. It's better if all the Link mains that exist know about the current metagame and discuss it collectively, because that actually increases the chances of a new discovery being made, rather than 2 groups in which 1 is behind and all of its discoveries are old news for the other group.