There have been plenty of updates on the Hoenn Updates thread, https://pokemonrevolution.net/forum/viewtopic.php?f=14&t=7096 , which shows big information regarding the region.
On the "adjust some bugs here and there" section, it is essentially bug testing the region to find any quirks or bugs to iron out before the release to make playthrough as seamless as possible for the players - this isnt really a vague statement, the details of said bug testing is staff-only knowledge, hence why only "bug testing" has been advised.
No official timescale has been announced partially due to the bug testing, the time to find any/all bugs and then correct them can vary. Hence why none has been released yet. Please keep tabs on the linked article and that will be the first place to hear any Hoenn news.