Thank you for responding objectively to the concerns I raised. I understand the points you are making, but respectfully disagree on some of them. Team synergy would not necessarily need to be rebuilt if the players are already used to playing with the rest of the team when they swap in and out, so that is kind of a moot point. Every single team IS eligible to have 6 players, but how many teams are there reading this thread who actually are able to take advantage of this rule? I only know of one team, the team who wrote the rules for the tournament and put it together, who is able to and will take full advantage of that rule and find other competitive players to fill a team of 6. Other teams, correct me if I am wrong about that.
A single player can play every job in the game, but people very typically have a main job they focus on the most. Having access to 6 players allows for more people who "main" certain jobs to swap in and out to counter other party compositions. For example, lets say the dps of one team was monk & summoner with a white mage healer, and the other team had ninja & summoner with a scholar healer. The first team only has 4 players (because wolves den is pretty dead and it was not possible to find extra competitive players), and those are their main jobs, so they stick with that composition. The other team has 6 players, and the two in reserve are a bard main and a dragoon main, so they swap in those dps to counter-comp the other team. That seems unfair to me. If the summoner main in team two switched to bard, and the ninja main to dragoon (instead of swapping other players out), they most likely would not be as good/intricate on those secondary jobs as those other players who main those jobs, so counter-comp would be much more of a challenge. See what I mean? Now if one player is a beast at two jobs, that should be rewarded, because they have the skill to be that focused and effective on two different jobs. So why not level the playing field by just allowing people in 4 player teams to switch jobs, and not switch actual players who main different jobs?