While I agree that the expansion will likely be there time when they give us a new tomestone, I do not think they will remove the weekly cap until 2.55 at the earliest. This is because 2.55 seems like the logical time for them to remove the loot lockout for WoD and with that giving players unlimited access to i120 gear. In doing that, it would not make sense for them to keep the cap on poetics. Which is why I think that then is the time they will remove it.