I wish they'd do more in-game interaction. They're on the right track with the GSF streaming and the pvp they did in arenas. I think they could do more on the pve side. In other MMOs I've played, the community devs would spawn in and randomly spawn monsters, e.g. in SWG (I know, I know) I remember when one of the community devs spawned into Theed starport and spawned Rancors, Nightsisters, some of the rarer bosses (which also counted for badges) all while dancing around and interacting with crowd. He even took requests for spawns.
I think it would be cool for the community team (who are already no doubt over-worked) to do more of this in game. It would also be cool if they invested in making their twitch stream higher quality and featuring player organized events such as some of the dueling tourneys and OW pvp events, as well as some of the top-end progression guilds doing walk-throughs.
And to the haters who'll no doubt flame this; here I cooked up some bacon