I wouldn't say they're showing it off and stress testing exclusively. They are fixing things. Keep in mind that, as a programmer pointed out to someone else the other day, making changes that seem simple doesn't always take a single day to sort out. A lot of the things that people are debating were never going to be completed in the game in a matter of days (and the Open Beta has only been out for, what, a week or so?). They have been fixing a lot of "the game will not work if _____ happens" kind of problems, which I imagine the majority of their time is spent on because that's an actual gamebreaker rather than a dealbreaker. If they're spending their time on that, good, because those things understandably are priorities. It's not their fault nobody figured this out before Open Beta came around. However, they have been touching up on things.

People have been checking their ping and a lot of people have reported an improvement over the past few days. The chat issues (bouncing chat, chat telling you about loot that other people get, etc) are thankfully resolved, too. The download speed has improved, probably due to an increase of population (which will always improve torrent speeds). The mouse lag has been decreased dramatically from the first day in my experience and that of others, and the HARDWARE_MOUSE option was only recently added from what I've heard so hopefully it will be open for use sooner rather than later. They are improving things, just not as fast as we'd like. But that's normal - people always want things fixed faster.

Hopefully the chat system will come in. I'd like it, too. But I wouldn't throw out my preorder over such a thing. Fatigue? Likewise. I want to craft as well as beat things up, though, so maybe the spreading out of my time in different classes means that I don't have as much of a problem as you might.

The UI lag is as close as it gets to a dealbreaker for me, and I'm sure the whole world will be mentioning that to SE and I'm sure they'll respond to it rather than ignore it forever. AH will come in someday, too, although I don't know when.

Still, this is what a beta is for, yes? Sure, the game might not change instantly but we shall see how things go.

The main thing for me is whether or not I am enjoying myself. So long as I'm having fun - and I've been having a lot of it - then I'm good.