Alignment will be a bit funky. Here's what I propose, with the Blue Jays moving to the NL as an expansion team. Indians are the central team that's farthest east geographically, so they slide to the AL East.
NL East: Braves, Phillies, Expos/Nationals, Blue Jays
NL Central: Cubs, Cardinals, Pirates, Astros
NL West: Dodgers, Giants, Diamondbacks, Rockies
AL East: Yankees, Red Sox, Orioles, Indians
AL Central: Tigers, White Sox, Twins, Royals
AL West: Rangers, Mariners, Angels, Athletics
Share your thoughts on this arrangement. Meanwhile, get those keepers in. I'd like to get them posted before I have to drive this afternoon. Otherwise, I should have some time tomorrow morning.