Agreed on the A's. I'd like to see all regional pairs kept separate (Seattle-Portland, Oakland-San Francisco, Angels-Los Angeles, San Diego-Arizona) and conserving as much of the current divisions as necessary. Also, the Western and CA divisions travel distances are not balanced.
(renamed) Western: AZ, LA, SF, POR
Pacific: SD, Angels, OAK, SEA
I put the Padres in the Pacific due to that division having to go further north, so the Western division has to go further east.
This puts the city-to-city driving distance at 1,394 miles for the (renamed) Western division and 1,296 miles for the Pacific. With Second Base's setup it's 505 miles for the CA division and 1,528 miles for the West division.