Exactly. If you want to compare anything in this game to WoW's rested EXP, it could only be the SP bonus from Guardian Aspect, the difference being you can choose when to use GA, and you gain it even while logged in, while in WoW you are forced to go through your rested EXP until it's gone, and it only regenerates when logged out.
A WoW-style rested EXP system does not fit this game, because of bazaars. There are a lot of people who leave their characters logged on 24/7 because they are standing in the middle of Ul'dah with their bazaar flags up.
FFXI got the whole bonus thing right with the EXP bonus rings. It would be best for FFXIV if it was done this way, or maybe the Guardian Aspect system can be expanded for utilization outside of levequesting.