Not really, as in FFV and on you could mix-and-match Jobs/abilities. In FFIII, some Jobs just had abilities unique to them. In FFIIIDS, since all the jobs are rebunked, some jobs that had rather useless abilities before (Sing comes to mind) will now be more useful, and jobs that didn't really have any abilities before have an unique ability.

The Bard in particular now appears to be really broken.