Nothing new has shipped. But we're close.
Where are things with Phase 2?
Phase 2, the ability to save Custom Question Lists (CQLs), is almost ready to ship. It got stalled, a lot. Part of that was that I ended up spending more time on Winter Bash hat triggers than I thought, part of that was more significant changes than I was expecting, and part of that was the turnaround time on reviews and re-reviews. Excuses, I know.
As it stands right now, the code is out of review but the architecture team needs to ship its Phase 3 changes for TagEngine alongside the Phase 2 changes for the web, and they don't want to ship a big architectural changes to performance-critical code right before all the architects go on vacation. So, January.
Where are things with Phase 3?
As mentioned above, the biggest hurdles for Phase 3, navigation and new content indicators, have are almost resolved. I'm expecting the UI work will be pretty straightforward, just needing to be optimized. But given the delays in Phase 2, I'm not going to publicly suggest any rollout date.