I'd like to see daily articles posted in each lounge giving updates on each game.
Perhaps a curated list of news and community content. Such as with Destiny, it could have the latest Bungie blog post, popular YouTube videos, and strategy guides for dealing with any content shifts or glitches.
They have a Daily Moot post which includes info on a lot of the different games that have lounges, if anything big has actually happened to said game recently. Probably way easier to just keep doing that than to post in every Lounge every day :P