Much of what is being said here applies equally to Kofabulator or ANY widget application for that matter.
Stardock has traditionally taken the role of making available the technology and letting the community run with it. Clearly, in DesktopX's case, this has not worked out so well.
DesktopX is, by far, the easiest of the widget enabling programs to create widgets for. Things like "creating a standard GUI with tab controls" is most easily done on DesktopX (and in fact, CANNOT be done, as far as I can tell, on Konfabulator or the others). Wiht DesktopX, I can at least embed web pages into ActiveX controls if I need to create a standard GUI. HTML is about as easy as you can get for this kind of thing.
DesktopX also supports things like clipboard. I agree that the typical Konfabulator widget is prettier, but are they more useful? The translator widget for Konfabulator doens't support copy/and paste. How amny people are going to sit there and type in what they want translated as opposed to copying and pasting in there?
Ultimately, the community is the one that is going to determine the popularity of these programs. The technology is there. There's not a lot of incentive for Stardock to sit there and crank out widgets to give away for a $20 program when it can just as easily put that time and make gadgets that sell for $10 to $20 on its own (I wouldn't be surprised if Aquarium Desktop has outsold all the widget enabling programs combined and it is a DesktopX gadget).
There are tutorials that walk users through all kinds of simple scripts and simple preferences. If users won't create widgets for others then there's not much we can do. We can create premium level widgets but they'll be gadgets and they won't be free.