IMHO the correct method is to drop UA's caste-system boarding entirely, and use CO's much fairer, easy-to-comprehend system.

I've seen UA use up to 9 separate boarding zones when a GA boards a 3-class and decides to board GS, then Intl F, then 1K & Business as separate groups within the Red Carpet.

Somebody explain to the general public how "Seating Area 1" is as late as the 6th group to be boarded (2nd through the non-elite lane) and never the first zone.

UA's system is part of its overall highest-elites-wonderful, low-elites-dirt, regular customers-lower-than-dirt mindset. They've taken customer segmentation way too far.

Note that I've been a 1K, so I've seen it from the higher end of it, the 1P/2P end, the partner elite end, and the now-lower-than-dirt end of it. It's crazy.