SEA for more international is really interesting. I could totally see a world where AS becomes the North America's OW airline of relevance for Pacific flying and connections, and completely eating AA's lunch on Pacific (although AA has all but given up.)
12 international destinations not Mexico or Canada, assuming they are mostly across the pacific, that's already more than AA.

Then AS can profitably build up SEA further. AS/SEA can be for North America <> Asia what AY/HEL was for Europe <> Asia. Once that starts rolling I think DL will really start to bleed in SEA.

Maybe it's not a bad thing if the long haul aircraft are not super premium dense. SEA connections may not attract the most premium flyers but will be great for Y and PE.