Would it be an abuse of my moderator authority to retroactively grant permission to necro my own thread? Maybe I should ask the other moderators.
In any case, yes I am still working on this. The lack of updates to the thread is a combination of me not getting anything done on it for a while and not wanting to double post much.
As it happens, I submitted the first change since 3 months ago for review 3 days ago, and no one's given any feedback on it yet. It kinda snowballed a bit, with changes needing other changes needing other changes, so it's a bit larger than usual. I'll send you a PM with details for joining the code reviewer list.
Ideas and questions are always welcome, though I'm not going to take every idea and many of them would be a long way off from getting implemented. Thanks for the interest!