What happened to the sets?

So, if you'd noticed, in the past year or so the DiMansion got a massive downgrade in size. They stopped showing the foyer and the front door at all, the living room itself was smaller (the Stefano portrait felt like crammed onto a wall too small for it) 

It seems they've decided to do a switcheroo, and they used parts of the Kiriakis mansion to build a new, far more robust DiMera living room, and they've given the Kiriakis living room the DiMera treatment... the entrance is presumably gone, and the room in general is far smaller. I think it makes sense. A lot of characters are going in and out of the DiMera house all the time, but meanwhile... John Aniston's health means we don't see Victor much anymore, Suzanne Rogers is on a leave of absence, Brady and Xander don't live at the K-Mansion anymore, and They probably decided that with less focus on the Kiriakis family, that's the house that could stand to have the smaller set.

I'm not sure what's necessitated only one mansion getting to be a robust set. I wonder if it's the fact that the Horton house has become a standing set? The past bunch of years it's appeared only in like the 2 month period around the holidays and then vanished until next holidays. But we're going on April and it's still up and oft-used. Presumably they only have so much studio space.