Well seeing as there are only 2 magic classes in the game i'd be all for an implementation of a couple of DoM classes in ARR launch or early updates rather. being as that yoshi says it's suppposed to be a fan service title i would say you have to implement RDM at some point, as they are staple to the series. I personally think it would be awesome to switch it up and have rdm's use guns this time and be based on the musketeer class!

Shooting magic enfeeble bullets ftw and have super potent enfeeble and en spells/bullets, fast cast, haste etc. of course you don't want to shoot a haste bullet in your allies face to give them a buff lol so that may have to be an actual spell.