I think the earliest point you can enter Idyllshire is about level 46 or 47 in the story. 3.0 gates you from entering future areas until the story allows it.

The only way it could work is if low level players got a similar in an early area. And even then, it's redundant, and sharply limited, as you simply won't have much content unlocked, and already have good reason to continuously run old instances in EXP.