Gina responded in that thread 4 minutes after you opened this thread.
"Just to update, the change we made to PC NA and EU earlier disabled all guild history, not just the addons utilizing it. This is not a permanent change, but a stopgap until we have a chance to identify and fix the core issue. Thanks for understanding, and apologies for any confusion this may have initially caused."
It does not speak to whether or not the 5 day history and addon block is permanent.
I'd really like an answer on the last part, as it is extremely important to the functionality of many guilds and the trading system.