I think this is a poor idea. I'm not talking about whether or not there is a personal parser in the game, or even a optional group parser, I'm talking about the leaderboards, rankings and rewards. This is a cooperative game, not a competitive game. If you start injecting more competition into the game, people will cease cooperating, and start playing the blame game when their numbers are somehow held back by others.

The last thing we need in FFXIV is anything that makes the game itself a competitive environment. In my opinion (and experience) team members who compete with each other, do not cooperate effectively. Because doing so harms their personal ability to compete against the very same people they should cooperate with.