I just resumed my subscription after a many-month lapse. And of course I noticed many positive changes.
But my favorite by far (and so far) has to be being able to customize the widths of the left and right columns, especially the left one. It always drove me nuts that I either had to keep the name of the elements short or deal with not seeing all of the title. It was especially bad when I used Dabble on my small Chromebook.
Great job and kudos, Jacob