To clarify: We post a news update every week, patches are less often. We actually haven't done a patch for about 2.5 months now as we've been adding some major technical features, and subsequently introducing many, many bugs.
However, we're in the process of cleaning up after those features now and there's going to be a pretty awesome patch released before the end of the year.
There will be no Overworld in War For The Overworld. Only underlords and dungeons. Check out the official page: they've done two major posts in the last two days summarizing the last year of development and concerning their plans on the future of the game.
Why don't you just read the patch notes? https://wftogame.com/patch-1-3-release-notes/ Last update added a map editor, which is guaranteed to result in many interesting custom maps. They are some out already.