News versus threads: long-term visibility
My primary concern with a Reddit-style format is that Reddit is built for "news" rather than long-term threads. Even the most popular, most-upvoted Reddit thread automatically dies after a few days.
I've overseen at least two long-term threads which (I think) sustained useful long-term discussions and would have never made it on Reddit. To the extent that this site functions like Reddit — and I have read that there are significant differences — these threads would also never happen here.
Synergy — I created this thread to discuss the "support starvation" / "4 goldstreams for 5 Champions" situation and to propose one possible fix, a new mechanic that would give bonus splash gold to nearby Champions. This thread went on for months, with over 150K views, 8K votes, and 1K posts. I think it really helped move forward the entire Support discussion and I like to think it contributed to some of the Season 3 changes.
Factions Sign-Up Thread — I created this thread for Factions sign-up. Factions (www.leaguefactions.net) is a community-powered game mode in which Summoners declare for a faction, such as Piltover or Demacia, and then fight matches using faction-specific rosters that culminate in shoutcasted tournaments and influence the outcome of a storyline (like a war between factions or a Void invasion). Counting the various storylines together, well over 5K players have signed up for Factions.
Sign-up for Factions is handled through Google Docs, but I have new sign-ups post to the sign-up thread as well for two reasons. First, it verifies that they indeed own the account they're signing up. Second, it bumps the thread. I feel it's fair to give the thread a couple minutes of front-page time for every person who joins. The data indicates that "seeing the thread bumped up" is a major draw for new players. I don't know what would happen with the new Community system. Perhaps there could be a Factions membership that people could add to their profiles, like a Facebook Group, and it could spread virally from there?
Anyway, this is one of my major concerns.