The only true thing I care about for APP3 is improved call quality.
The design flaws of the earlier versions were beyond problematic. Apple used software enhancements and firmware upgrades to try to solve for this flaw, but call quality seemed to be an afterthought - something I could never understand going all the way back to APP1. To this day, AP2 are still the best for call quality, hence why they’ve retained their price point despite being more than 5 years old.
It surprises me that call quality rarely gets discussed on these wishlist threads - almost as if folks here don’t use their AirPods for phone calls. I need something that works on trains while commuting, walking outside on city streets bustling with traffic and sirens, and taking work calls while driving in the car.
If Apple can’t solve for these things with APP3, count me out.