I think that, starting with Final Fantasy X, Dispel became increasingly more important.
It is a vital part of strategy and party building in Final Fantasy XI, and it is required at certain points to remove excessive positive status effects from enemies in Final Fantasy XII. By this pattern, I would think that Dispel or a skill with a Dispel effect will be necessary in battles in Final Fantasy XIII.
Maybe developers are putting more time into strategies for players, or maybe they realized that status effects as a whole were unpopular because they rarely worked. I find that status effects are, in general, more important than they used to be.