As an non GGL I really do think that F should be group 0. Having done 2 trips last month to EWR and JFK which are very premium heaving the queue to get anywhere near the gate had a huge amount of group 1 passengers. I can't see how 8-14 passengers really will harm GGLs
Sure, as a non-GGL you don't think GGL's should get an additional perk for spending vastly more than a single F customer. But try and understand it anyway.
To the airline, GGLs are the high-rollers. Fs are people who are doing it one-time. Who should they reward the most? Isn't the answer obvious?
So if you have 2 groups of people that you want to reward highly, 1 slightly higher than the other, then => GGL should get Group 0, First should get Group 1 and Gold's Group 2 when there's a first cabin, and Gold's get Group 1 when there's not.
This is exactly what AA does.
The problem is that there are too many group 1s. Not that group 0s exist.
You can't see how boarding 8-14 passengers with group 0s will harm group 0's. It's not harm. It's dilution of the perk.
Right now, the tiny numbers of group 0 passengers, if any, simply present themselves to the gate and then get ushered through, costing nobody in a lower group any time at all.
I can't see how 8-14 passengers will really be harmed by not really having to wait for any group 0s.
But put it this way. Should 1 or 2 people have their perk, which they spend 10x for, diluted by 8-14 others? Or should 8-14 people who spend 0.1x for their perk have it barely diluted for a 5 second wait for 1 or 2 people?