Delta Cipher

[nablator]

There are many different ways that could work, but it's a theory that to me seems attentive to many of the properties the text needs to have.

It's not nearly restrictive enough. You need more constraints than frequent self-similarity to explain Voynichese. Also ambiguous word breaks make ciphers relying on words unlikely. There is a workaround with a possible re-parsing of tokens ignoring spaces that could also explain the rigid word structure.