I would like to discuss the differences and similarities I see between their work and my perspective; are you are familiar enough with STEPS to discuss it from their point of view?
I think I am (though I'm but an outsider). However, I can't really see any significant difference between their approach and yours. Except maybe that their DSLs tend to be much more Turing complete than what you would like. It makes little matter however, because the cost of implementing a DSL is so low that there is little danger of being trapped in a Turing tar-pit. (To give you an idea, implementing Javascript on top of their stack takes 200 lines. And I believe the whole language stack implements itself in about 1000 lines .)
In the unlikely case you haven't already, you may want to check out their other papers, which include the other progress reports, and other specific findings. You should be most interested by Ian Piumarta's work on maru, and Alessandro Warth's on OMeta, which can be examined separately.
I'm not a programmer. I wish I were. I've tried to learn it several times, different languages, but never went very far. The most complex piece of software I ever wrote was a bulky, inefficient game of life.
Recently I've been exposed to the idea of a visual programming language named subtext. The concept seemed interesting, and the potential great. In short, the assumptions and principles sustaining this language seem more natural and more powerful than those behind writing lines of codes. For instance, a program written as lines of codes is uni-dimensional, and even the best of us may find it difficult to sort that out, model the flow of instructions in your mind, how distant parts of the code interact together, etc. Here it's already more apparent because of the two-dimensional structure of the code.
I don't know whether this particular project will bear fruit. But it seems to me many more people could become more interested in programming, and at least advance further before giving up, if programming languages were easier to learn and use for people who don't necessarily have the necessary mindset to be a programmer in the current paradigm.
It could even benefit people who're already good at it. Any programmer may have a threshold above which the complexity of the code goes beyond their ability to manipulate or understand. I think it should be possible to push that threshold farther with such languages/frameworks, enabling the writing of more complex, yet functional pieces of software.
Do you know anything about similar projects? Also, what could be done to help turn such a project into a workable programming language? Do you see obvious flaws in such an approach? If so, what could be done to repair these, or at least salvage part of this concept?