Well there are some saving graces in FFXIV that would help prevent RDM from becoming (at least totally) assimilated into the same role in FFXI. The biggest differences are built into the game mechanics and we don't have to deal with poor skill levels, the power of spells and weaponskills grow with our level so there is actual scaling, and the other big one is all classes/jobs have their own UNIQUE abilities and spells with limited support abilities kills our dependency on spells from other classes, so there is a good solid chance to make something truly good here.