No expansions on any levels, if anything we've tightened things up. Bit of a rundown:
Valley is the same as it was before but a lot prettier with a tonne of environmental storytelling and other work. That house in your image is cut content, it used to be where the key suspect's daughter lived, but we moved that to be inside the house. Valley used to be a lot larger with a huge tunnel that connected the two places and a greenhouse even lower than that.
Dealer has seen some new routes added but structurally it's the same, again if not tightened up for more narrow CQB combat. It's a work-in-progress however.
Gas has also been tightened up with more narrow spaces and a few new doorways for alternative entries and flanks. (one new doorway outside, one new doorway inside)
Meth has also seen the same sort of treatment. The tunnels have been replaced entirely (area-wise it's less than the one that's out in the playable build, but gameplay wise it should be more of a challenge), and more cover for AI has been added around the entire level.
Keep in mind that some levels are probably going to be entirely (or mostly) replaced as we go forwards and build the world of Los Suenos and implement our story changes. For now that's gonna be Farm (made smaller), Hotel (made smaller with a more focused story with similar suspects to Penthouse), and Port (the variation in levels is a pain in the ass to work with, bomb threat Port is almost an entirely different map).