I think people just haven't found the optimal use for classes yet (ie. what abilities work best on what classes for what purpose). I suspect classes will probably end up as niche roles in party play, sort of like odd job/subjob combos in XI. RDM/DRK wasn't always popular, it took people a while to figure out how/where it could best be used. More generally than that, how about melee WHM? When properly geared, it was a beast with /nin... maybe we'll find it's possible to make a hybrid melee/mage DD glass canon THM one day. Dare to think outside the box and experiment, or we'll never get anywhere!