I'd strongly encourage everybody (including lurkers) to check out this blog post I just wrote:
https://parsers.org/roadmap/notes-on-the-ongoing-congocc-api-evolution/
To be honest, it is hard for me to judge how accessible the post is for most people, so I am quite interested in feedback on that. The best place to provide any feedback is this discussion forum. I do have comments enabled on that Wordpress blog, but I tend to think it's preferable to have any discussion here.