Fortress | Sveet
What follows is a bit of a ramble that doesn't do much to attack your solution but does discuss the problem in detail.
This is something that we talk about quite a bit with the staff. It's a really complicated problem - made more interesting because perception and reality don't necessarily align. The site is still highly trafficked for example - as an Alexa top 30K website there are still hundreds of thousands of unique visitors and millions of page views monthly.
Smashboards has, historically, had it's highest traffic around the time of game launches - the lead up to Brawl and the lead up to Smash Wii U. The bulk of traffic are newer players and casual players. In the mid/late 2000s (until about 2013), the traffic for hardcore, competitive discussion was also centered on SmashBoards. The discussion data post Brawl launch (2009 - 2013) shows a linear decline in posting whereas the discussion data post Wii U launch (2014 - 2017) shows a mostly log(1/2)x curve with the caveat that this doesn't really form until post summer DLC 2015.
From an ownership perspective, the question becomes:
why is user retention (as a measurement for posts per day) different post Smash Wii U launch vs. post Brawl launch? Historical traffic stats provide interesting clues. Incoming traffic today splits 70/15/8/7 (search/direct/social/referral) but back in November 2014, this was 50/20/20/10 - as a percentage, social traffic has basically collapsed vs. launch timeframe and organic search now has a commanding share. The site also still boasts a much stronger than average direct user traffic percentage when compared with other websites (most sites see 95% of traffic from social/search).
To really drill down what's happening, I often pull back and think about the changes to the wider internet when I think about this question - and the question has a simple answer that is also another question:
where did the discussion (posting) go? Importantly, I'm distinguishing discussion, and not users, since Smashboards still has fairly high traffic and reach. Why did discussion not continue post-Wii U launch like it had post-Brawl launch? Where did that discussion go?
Until recently, the answer was Facebook, Reddit, messenger apps, and to a lesser degree Twitter (for top players). Now both Facebook and Reddit are shedding discussion to Discord (but not, I'd argue, Twitter). Reddit actually has several serious problems, one of which is that new properties aren't even getting established anymore as the traffic is immediately diverted to Discord (see
r/Pokkengame).
In addition to these platforms, there is also the impact of Twitch and YouTube. Mostly Twitch, though. Prior to 2011, you got results from Smashboards. Now, you probably saw it happen live. Entire thoughts and discussions about tournaments and matches are either occurring in Twitch chat, or never occurring, since the information was consumed in real time. I won't touch on clips and highlights since these weren't a source of significant posts in Smashboards lifetime (e.g. it's a new user behavior and it's found it's place for being shared on Twitter and Reddit).
The last area and issue are top players - and they are super interesting. There was once a time when all the top players were on Smashboards, every day. What happened? A few new developments but the root issue is most top players are seeking to grow a following, and that's easier done on Twitter, Facebook, Twitch, and YouTube than on Smashboards or even Reddit/Discord. Most top players are now working on building their personal brand, and any creation of content off a platform they aren't monetized on hurts that endeavor, unless it happens to be a platform (Facebook, Twitter) that they can use to direct traffic to their monetized content or otherwise elevate themselves and their opinions above other peoples content (Twitlonger, Medium).
EDIT: There is a whole discussion on mobile vs. desktop as well that I'll keep out of this.
For Smashboards, I'm not sure a rearrangement in how discussion is presented would fix the issue, especially one that is based on network externality - it might actually just alienate the users who enjoy this presentation layer vs. Facebook or other mediums. It might just be the new reality as we approach 2020 is that traffic is based around game-launch cycles - and to some degree the continued success (until recently) of NeoGAF might represent that the old forum model still has a place when the information it's based around (new game launches) is constantly fresh. There is even some evidence of this as the prolonged DLC cycle for Smash Wii U kept posting rates quite high until late 2015/early 2016.
We are also still trying new things. This week we announced the official Discord for Smashboards and also setup a VIP discussion - the hope with the latter is this may replace things like Twitlonger for Pros and also provide a layer of elevated thought discussion vs. Twitter. Maybe it will be received well, maybe not, but as a site we've worked to implement new features of the last several years (tier list generator, guides, rankings and tournament results, groups to name a a few) with various success.