12.0.1 is live!
There are a lot of spell changes, and the apex talents are now visible on the talent trees.
You will need v169 or higher of the in-game addon to import/export talents correctly.
Roadmap
We have 3 weeks until Midnight officially releases. Now that 12.0.1 is live with more complete spell information, we will be working through all of the new apex talents, set bonuses, etc. leading up to Midnight. Most of the apex talents are not implemented yet, though the user interface and addon should let you pick them correctly now.
Once we have everything working, we hope to release a couple new features within the first month or two of the expansion, so stay tuned!