They replied this on the forums just a moment ago with some insight to the priorities they are working on right now.

TLDR: All hands are on deck for the release of the expansion Bridges & Ports; after that works resumes on other things.

Outakes:

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        Unfortunately, the Asset Editor related work has had to be pushed to the background while we have been focusing on other priorities. After the Bridges & Port related work, we will have the team tackle the remaining issues, and the asset editor for buildings will be released as soon as it’s ready.

    The plan is currently to support building assets (and props) and expand the supported asset types in the future. Once we have established basic support for assets in the Editor, more complex asset types, such as vehicles and networks, can be worked on.

    We’re currently working on:

        Fixing the issue with too few resources produced by offices being consumed, causing office company worker counts to drop to the minimum amount.

   
  

"We take a look at all the Free items and Patch Notes for the 1.2.4 release (out for the public on the 18th March), plus the new Creator Packs: Dragon Gate by Emperor Li, Mediterranean Heritage by Zarrix & Leisure Venues by Gruny. Enjoy :-)"

With a blend of tradition and modernity, this Creator Pack by community creator ‘Emperor Li’ allows you to create a vibrant Chinese inspired market quarter.

Let your citizens take a stroll down shopping streets adorned with classic elements such as lanterns and shop signs, or visit the traditional temple that adds a touch of East Asian splendor to your cityscape. With vibrant red and gold, ‘Dragon Gate’ will bring the fiery charm and elegance of Chinese architecture to your city.

Official Page with Trailer and Screenshots

Explore the timeless charm of Mediterranean architecture with this Creator Pack, designed by community creator ‘Zarrix’. Mediterranean Heritage’ introduces a range of historic buildings from the 15th to 19th century from regions such as Italy, Spain, Portugal and Southern France. Featuring fluid design and characteristic soft color variations, this pack will bring southern European elegance with a modern flair to your city.

Official Page with Trailer and Screenshots

Elevate your city's entertainment scene with the Creator Pack ‘Leisure Venues’. Designed by the community creator ‘Gruny’, this pack transforms your city into a vibrant hub where citizens can unwind, have fun, and enjoy life to the fullest.

From delightful dining spots and serene parks to thrilling sports facilities and nightlife venues, this pack has all your citizens need to enjoy their free time.

Official Page with Trailer and Screenshots