I think AoTS was carefully chosen for the dual cheap GPU beating expensive single card narrative, but if there substantial gains anywhere else I would had expected that game to be showcased as well.
I gotta hand it to AMD. They already have people calling the next generation based on a randomly generated benchmark of a game that doesn't look that great and that nobody plays. There's already a general view that AMD is "better at DX12" and we don't even have any actual DX12 games yet.
Well done.