I have no opinion for or agains't the idea of a wipe now.
But what i believe is that a wipe should be brought first and foremost if there is significant changes in gameplay, significant enough that everyone need to start a new.
If the dev team think they are ready to add two more factions, for instance, then, there should obviously be a wipe, so the six factions get the same fresh start, instead of having four team of well geared vets and two team of underequipped noob.
But i don't see any point in wiping for the sake of it. If there is not enough new game changing updates, people might come back, but will be quickly disapointed and leave anyway.