My feeling has been that the class system it set up so that 'classes' are really only used to designate leveling allotments. When it comes down to it, none of us are gladiators, conjurers, or red mages - we're adventures. We all have our unique little skillsets (until people start mashing out the most efficient combinations and cookie cutter builds start appearing as a result), and aren't really intended to be pigeonholed into a single classification.

The funny part of this is that it seems to drive some players insane, so we have all these posts trying to introduce ways that we can two steps backward and pigeonhole our characters back into some sort of defined role.