Basically, this is a chance for the people who quit because XIV didn't scratch their particular itches to come back and see if the itch is now being scratched.

Whether it's the chocobo racing or triple triad, the addition of the silly time wasters may be just the thing that tips someone from "meh XIV was too boring" to
"by the Twelve COLLECTIBLE CARD GAME!"

As for the question of whether it's up to SE to load balance, or the players - SE does its best to lock down character creation on Balmung, and people don't keep trying to keep making characters on it anyway. Lamia is crowded and heavily populated too, but I haven't been locked out of the Gold Saucer once, surprisingly enough.