Just wait up for the endgame contents and more party play stuff, he did mention that once the battle system's foundation is built they can start working on all these kind of stuff. Without the base battle system, adding more end game content could be a huge risk to the game. He's not planning to make this game only for casual players, he know their are different play styles for everyone and he's going for all but you have to understand with a broken game like FFXIV they have to do it right or it's just going to get worse, and it might make the hardcore players even more pissed off with the end result if done wrong.

From game programmers point of view I rather have the root system, libraries all set up correctly so it's easier to work on the actual functions, how the program will run. Rather than making the program first then building the libraries, then going back to the program and try to figure out how to fix it so it runs better with the better coding, in some cases might be too hard to go back to fix + fixing might break other things and requires more work in the end.

Can't think of good real life example...lol; can only think of ideas with food.... I'm hungry damn it...