I have experience with physical eurorack modular synths, visual sound programming tools (VCV rack, Max, audioweaver), and DSP programming (Supercollider, Matlab). I think the simulated wires paradigm IS the best one...for someone who doesn't want to learn at least programming and probably also matrix algebra. In my experience, sound code is generally a LOT of ugly boilerplate code surrounding a few really brilliant lines of code that require years of education to understand. But in a code-based version of VCV rack, the brilliant code would all be inside some object.

You're essentially dealing with connected one-directional graphs of arbitrary complexity. Feedback loops are required for the eurorack experience. That's pretty easy to lay out visually, but I haven't seen good ways of laying it out in code. There's room for innovation here; Someone in the programming world has a more intuitive, more informative way of visualizing data in a graph that could be adapted into DAW paradigms.