I’ll politely disagree that the Easel & AKS are examples of what you’re describing.
The Easel has a great interface into a semi-modular synth, but making presets requires using a soldering iron. It suffers the same fate as a lot of modular though – a lot of people use it to make the same sounds, and they are often ‘monotextural’.
The Synthi AKS is a fully modular synth and doesn’t have patch recall or presets. Maybe it’s enticing because the patching metaphor is physically (and thus mentally) isolated from the performance of the knobs / keyboard. A similar separation of patch/performance is present in a different way in the MS-10/20 and a number of newer synths. Perhaps this is enticing about the Easel too? Most of the patch points are collected in a strip along the middle of the instrument, not interspersed.
I would argue neither of the above instruments has particular ‘complex’ control interfaces (or rather, they have the same parameters as a typical modular synth). In many ways, the meaning of a parameter in a modular synth isn’t determined until it’s patched. Perhaps the Easel’s controls are seen as complex because of the predefined patch?
My critique here is not ‘pro-modular’, rather I think there is an interesting point you’re trying to make, it just seems clouded (to me at least). It seems you want 1) a tactile parameter interface, 2) less patch cables (I agree!), 3) default signal flow (for audio at least).
I agree with a lot of what you’re saying, but I’ve not found ‘the thing’ in my search so far, so I can’t really point you there.