Allow Essence Traders to convert T4 essence to lower tiers

Once you get into the higher realms, you are really too powerful to be travelling back to the lower realms to farm T2 and T3 essence. Please either allow the button that converts T2,T3 and T4 essence into T1 essence to convert to T2, T3 and even T4 OR have essence traders provide this service since they are traders it makes sense the that they can have essence of different values on hand. Another option would be to have someone at the Watch that makes this conversion.