Lava Cauldron should have 3 or 7 levels

Currently Lava Cauldrons only have 1 level of lava. With the addition of dripstone's ability to fill a cauldron with lava, I feel lava needs to either match water and powder snow cauldrons with a level of 3 for consistency, or 7 to signify the difficulty one should have when collecting lava in this way. It seems rather odd and overpowered to see a cauldron go from empty to completely full in a single action.