Work on the designer has not stopped. We are a small team with focus on many things, and the designer hasnt been on our prioritiy list the last couple of months. But it has not stopped, we will commit soon new stuff on there is all goes well.
And also very welcome to do a pull request if you want to see that date being moved
I just authored my first pull request (#24) for the designer. Would you mind taking a look at merging it. Also, pull request #22 would also be quite helpful if it was merged.