"Along the way to version 0, we tried everything from a Mathematica-like notebook built on functional programming to a purely spreadsheet-like model. We built dataflow languages and madlib based editors and read through papers from the foundations of computing. One thing that ran through all of this, however, was to make sure we never drank our own kool-aid too much. We dug through research and created postmortems and landscape summaries of all the projects that have come before us. We tested our ideas with actual people and against real projects. That meant that we "threw away" most of what we did to get here. It was the best way to keep ourselves honest."
... that is the minimum effort required. I have long advocated that people picking this problem up hit up what's already been done and hit the research to make sure they're not going down a known failure path.
If anyone's going to get to stick my skepticism about visual programming back in my face, it's someone who's doing the stuff in that paragraph, not someone who goes (basically) "Programming sucks, by extension you all suck, visual programming is obviously the solution because, visual! And look, guys, here's my 2-week solution that proves it out!".
I won't lie to you, I remain skeptical, but, well, I'm just generally skeptical about things that don't exist yet. I wish you all the best, and I promise you that if you do succeed I won't do that thing where I pick nits to claim it's a failure anyhow. And I also promise you that I'm happy to say you've been successful in some niche, not set the bar at "REPLACES ALL PROGRAMMING, EVERYWHERE!" or something equally silly.