I'm not going to advocate for any particular method of determining the World Champion. I'm just going to present some thoughts. At one end of the spectrum of possibilities is having only a regular season. Ideally there would be a symmetrical round-robin schedule. For example, each team plays 3 home games and 3 road games against each of the other 29 teams. The team that finishes with the best record wins. At the other end of the spectrum is having no regular season. There would be a tournament of some kind and the winner is World Champion. Between those two ends are so many options for having a regular season of some kind to set up a tournament of some kind that the number of ways to do it is nearly uncountable. If there is a tournament, whether a regular season has any bearing on it or not, the question then would be how to optimally structure it. For example, there are single-elimination tournaments. There are double-elimination tournaments, which are fairly common in baseball. And, with the complexity rising at each level, triple-elimination, quadruple-elimination, etc-elimination tournaments are possible. Within each type of tournament there are many possible ways to assign one bye or multiple byes to one team or multiple teams. There are also many ways to decide where the games will be played, who the home teams would be, etc. etc. etc. The number of ways to do this is nearly uncountable. With the nearly uncountable ways to determine a World Champion it's clear to me that whatever choice is made will be a highly arbitrary one, and that any option chosen will have many things wrong with it. So pick something that's not too complicated, accept that it's highly flawed, and just play baseball.