Welcome Philippe!
We're thrilled to have the participation of seasoned AsciiDoc writers such as yourself. And thanks for sharing your handiwork!
It's absolutely essential that, throughout this process, we preserve the essence of what continues to attract writers to AsciiDoc. We can relate about being self-made tech writers. That's what brought Sarah and I to AsciiDoc as well. Although we don't use DocBook as much these days, it was a crucial factor in the beginning that allowed us to migrate our content to AsciiDoc (having that escape hatch available). DocBook has also had a lasting influence on the semantics of the language, so that fact can never be understated.
> is it too late to indicate which parts of the AsciiDoc format I'd like to see changed/improved?
Not too late at all. In fact, too early. We're just in the process of getting this Working Group formed (the administrative aspects). An early step in that process is to submit a proposal for the technical project (i.e., the specification). Once that proposal is approved and executed, that's when the real technical work begins. The spec will then continue evolve indefinitely after that with each version that is published.
It sounds like you'll want to join that project once it's launched. We'll announce it on this list.
> I'm not a fan of all the parts of the AsciiDoc format
That's to be expected. We wouldn't need a working group and specification process if AsciiDoc was perfect. (We'd just rubber-stamp it and call it a day, but doing so doesn't leave room for improvement). This working group is all about making AsciiDoc the best we can make it and figuring out the best path to get there. So the friction of wanting something better is what lights the embers.
Best Regards,
-Dan