Hobo Elf
Arcane
So the system isn't retroactive and needs bunch of threads explaining the math just so people don't think they've lost AP (except they still think so). The only gain is smaller numbers to manage. Now I don't see a good reason to bother grinding it, unless they introduce some OP traits or when you're close to unlocking a new slot anyway.
If you haven't gotten any epic azerite gear yet, they have some pretty good traits, and they have 4 of them instead of 3 like the rares. But I need a level 25 Heart of Azeroth to unlock all 4 of those and yeah fuck grinding for that.
I'll just take it easy and focus on rep grinding and let the catch up mechanic carry me like any other smart person would do.