Seek party option, like with the flag up feature, /sea ___ inv commands, etc. Playing with others makes the game more fun. That old party system made parties so much more easy to set up. I really hope they bring it back, because without a flag up feature, finding and forming parties is going to suck.
Oh and fireworks... Yes I know most of them were horribly cheesy and less than impressive, but I liked them, and always kept a bazaar packed with fireworks and various often used things for almost all jobs at equal to or less than AH prices. It was a very convenient and novel bazaar, but sadly with the new bazaar limits I don't think I'll be able to do it as well in this game... Still, with the new graphics, they could make some super a lot of fun fireworks. :3
The AH I actually think is better left out for a little while. Yeah, I know it's a pain, but I can see why SE did it, and I appreciate where they're coming from. They want a truly player established economy, not trend based, nor gilseller based, nor whoever sets the price first based. You just can't get that with an AH on day 1. I think an AH will be essential in a few more weeks, but for now I think going without one is perfectly acceptable, and this is coming from a diehard crafter.