Found this at reddit, something about Stability changes and a few other tid bits of info, including some remarks about guild changes.
Nothing concrete but just enough to make you say Hmmm..
Edit: because the guild hall info is gone now.
Basicaly what was said ,in answer to the GH question about small guilds and Halls, was that there were several changes "planned" for guilds, not just Halls, the Devs are are talking among themselves as to what constitutes a large guild...
Mash Here