Interesting attempt, I can broadly see what it's getting at, but I can see some issues with it.
Following right from Dvorak: keep ZXCV? But then: willing to sacrifice pre-installed on Windows? If so, user could pick literally anything, Capewell Dvorak isn't the obvious choice there.
Sacrifice ergonomic for easier learning curve - depends on the degree. For example, Minimak4 -> Minimak8 -> Qwpr -> Asset -> Norman (and plenty of other more recent ones) all make this trade-off to a greater or lesser extent.
Considering an ortholinear board - I don't think "no" implies Workman and "yes" implies Arensito, Norman or Colemak-DH. The Workman creator originally intended his layout for ortho boards I think, but in any case, lot of layouts can work well on both types, especially those that are angle-mod friendly, such as Colemak-DH.
I kind of have the feeling that a flowchart isn't the most informative in situations like this, as they are limited to "yes" and "no" questions, whereas the reality is all about evaluating tradeoffs.