I think they'll need alot in the 3Rd expansion. Maybe bounties that take you back to the core game. Some added rewards for dungeons mayhap. New race or two would be well received. New zones that hit that sweet spot in activities between hot maps and pof maps. And player housing on top of it all. Maybe even a little pvp, wvw love too. It's alot, but they're going to have to hit it out of the park with the next exp to keep people coming back and make new sales.