That's essentially the kind of thing I'm getting at, yes. Character choices (of which jobs are the main example FFXIV has right now) should have implications for group building and playstyle. The game can support that kind of thing because it already does. That is not to say that it is easy to balance (WoW is a great case study in how difficult it can be), which is part of why I would like to see only relatively simple choices to start that would be easier to balance in practice, with perhaps the room for expansion later.