Warcraft is also 1 class per character, with transmog it's alot less information to put together since each character data just needs to account for 1 class type. FFXIV would have to take into account 15 difference transmogs, or 26 if we caught DOL/DOH gear. So every 1 FFXIV character could potentially equate to 26 WoW characters in terms of information needed to make it work.