The RFC process is continuing at the Corinna github repo.
Damian Conway has made a proposal for simplifying the syntax and the Corinna team is generally receptive, so we've adopted it (minus some side discussions about class data).
I call this KIM. KIM stands for "Keyword, Identifier, Modifier" and we're standardizing the syntax around that (there are open questions about method modifiers). As a result, Corinna is now reduced to four keywords, class, role, slot, and method. Modifying the behavior is done via attributes. This greatly simplifies the overall idea. Thus, instead of this:
We have:class Foo isa Bar does This { ... }
class Foo :isa(Bar) :does(This) { ... }
Other major changes can be read about in our Major Changes document.
As an aside, you can now clone and install the Corinna code. It uses Object::Pad under the hood, of course. There are tests and you can get a rough idea of what new code will look like with Corinna.
I know this it taking a while and I'm sorry for that, but we're being careful to try to get it right. Plus, I'm slaughtered with work currently. Seems all Perl devs who want work have it, so we're having trouble finding senior Perl devs who want remote work (oh, and we're looking for Typescript and Vue.js, if you know anyone).
Note: the RFC documents are not final. We pretty much have the minimum viable product (MVP) semantics nailed, but there are tricky issues regarding the grammar. Reading the issues in github will help if you're interested in helping.