Something like this?
In my opinion, the flexibility of the Twiddler inherently lends to diversity in layouts among users.
As one gains more finger dexterity, one will naturally want to alter their chord map accordingly to maximize the dominant use case, hence the hope of having a handful of chordmaps easily switchable on-the-fly in future firmwares. For example, while x/z does not occur often in normal English, it is the opposite for a Vim user. In other words, an expert's setup may not be the best choice for a beginner. To truly acquire proficiency, the learning will have to go subconscious into the fingers' muscle memory. Our neurology is very plastic. So instead of learning one best setup, the setup grows with you.
Any long time users like to chime in with their experience?