A bit of both I guess, real desire to increase capacity and response to AF. Note That in the past DFW was served by a 772 in the summer, now it’ll be a 788 and a 789, so it’s a somewhat tempered capacity increase whilst still offering more connections.
And it’s not such a bad offering, especially for OW Sapphire, which many of us here have. In Paris, the situation in terms of waiting lines at 2A/2C is never as bad as at 2E, and there is access to the very nice Cathay Pacific lounge; in DFW there is the Flagship check-in with escort to security, akin to Premiere in CDG, and the not too shabby Flagship Lounge. On board, seats are really good with direct aisle access and stable and speedy WiFi. Food is more refined on AF, that is for sure, and the service by AA staff may be “warm and familiar”, but the tap-on-the-back style of badly groomed obese maamas may not be everyone’s taste. Still, given the choice, I’d take AA on that route.