Ridge Mahoney of Soccer America likes Philadelphia's inclusion in MLS. He went so far to call it a coup.
Philadelphia beat out St. Louis for the 16th spot. I'd like for the league to stop at 16 and hold steady but having St. Louis and one more team wouldn't be the worst thing, I suppose. I don't think MLS can really have more than 18 teams, though. Sixteen would be perfect - every team plays every other team, once at home and once away. You could do away with the conferences and let the top six or eight teams into the postseason and everything would line up nice and neat, at least on paper.