Some people are getting hung up on semantics.

When you create a PF for T5 and decide that you would prefer to have at least one PLD, you are practicing a form of segregation. When you decide to run with a solo healer in PF, same thing. Making your own party by definition allows you to set the terms and means that some players will be excluded. Is it bad or wrong to say "Geez, I'd like to have a DPS limit break, so better make sure I don't end up with 4 bards?"

This whole thread has become ridiculous. If you want 100% random set ups within the parameters set by the game, stick to DF. However, be warned that you will find it virtually impossible to advance your duty and story progression until A) former end-game content hits DF and B) it has been out long enough that you actually have a chance to be matched with others who know the fight or are patient enough to learn with you.