They're still working on the next update, of which I dropped some info
here. From the looks of things, they seem to be on Patch 15 of the internal testing for that update, though I haven't played any of the WIP versions and don't regularly check in on what they're up to. Apart from the stuff I mentioned before, it seems they're mostly working on bugfixes and balance issues, with one significant new feature. I seem to recall hearing them mention some stuff about this before, but I don't know the full details. I think it's related to some new victory/loss conditions and seemingly some other details that could dramatically affect the game structure. With that in mind, it might actually be a significant delay before the next update is both feature-complete and with enough bugfixes that they feel comfortable releasing it.
As for what this new mechanic is...
Edit: Okay, now I'm actually interested, so I think I'm gonna poke around in the WIP build and maybe give some more info about what you can expect from this feature. I won't be able to get to it for a few hours, though.
Edit 2: Well, there's definitely a lot of signs that it's incomplete in its current form. So far the new feature seems to just randomly cause buffs and debuffs throughout the mansion, and while the framework is there for some other interactions, I could only get one or two of them to work.