American is eliminating the idea of a section of extra legroom seats at the front of coach from their 777-300ERs. Presumably this is about squeezing more seats into the plane, but has the added benefit of making sure Main Cabin Extra isn’t “good enough” for those who might buy up to Premium Economy.
And that’s all on top of changing the Main Cabin Extra section in their 777-300s from 9-abreast seating to 10-abreast, taking away shoulder width. With this reconfiguration the plane goes from American’s best long haul plane for elites flying coach to arguably their worst long haul plane for elites flying coach.