This article focuses on the Timebox issue. I'll be posting the follow up in a couple of weeks, will post on HN... although there's plenty of other content on this site that covers where I'll be going with that solution.
Apologies if it didn't cover everything you wanted - but I find that long articles tend to lose the readers too easily, and I'm trying to keep to a single main point-per-article in my writing as a matter of discipline.
I'll look forward to your thoughts on the next one.