I don't believe that will be any major decision making deal. He may have said that at one time, but that doesn't hold true to the possible nature of what they can add. If Musketeer is added first, then the statement isn't true at all. He wants to pull in different job ideas, but this isn't necessarily a necessity. We could end up with a year before the Thief/Ninja class/Job and get others that are already filled as far as role and job type goes.
I wouldn't say Dancer is a needed class depending on what you want her to do. I mean she could easily be a Melee version of the Bard, a debuff opposite of the Bard with similar schematics, or a Physical healer. I can't say she's a needed or mandatory class. There's nothing to say that they won't implement other physical tanks in before we get a Magic Tank as well, and we can get more generic Magic or Melee DPS at the same time as well before we get anything "new". All we are capable of is giving out educated guesses and an educated guess would say anything can come out between 2.2 and the first Expansion.
They could even break the Class/Job implemented before first expansion promise. I would assume balancing what we already have would be a higher priority before adding something that currently isn't in the game in any way shape or form, such as new Job types. For Balance, new tanks would be top priority, at least to see if that balances out the lack of there of. If not, then possible addition of benefits for playing Tank. If all else fails and cannot be fixed due to player issue, then move on to the next biggest and greatest.
As for PUP. I don't have an honest opinion on the class not being a FFXI player, but I heard the maintenance cost was high. With our current issues with making Gil and maintaining the economy, I wouldn't want a Gil sink class to come out and not be playable because you can't afford to keep up with the cost of the character.