This update was excellent. I love the new system, it's more flexible yet seems deeper than the previous one. I also like the new mastery system, but it is clear it's intended for the expansions, and not for the core game.
LA look beautiful, just hope they re-record the soundtrack with a live orchestra.
From the recent blog post, it appears anyone with access to the Guild Req. station will be able to get a guild hall. Access requires only that you guild has the current guild missions upgrade, or something along those lines. I think, based on what we know, that access is open to all.