pleasurableness

Edmund Burke "contrasted the smallness, the lightness and the pleasurableness of the Beautiful with the vastness, the obscurity, the painfulness of the Sublime," Mr. Taruskin writes.

So perhaps Mill's claim is that the pleasurableness of life is all that matters but that this cannot always be so well promoted by increasing the quantity of low level pleasure as by obtaining lesser amounts of high quality pleasure.

It is not, indeed, ruled out by the logic of the naturalistic fallacy that degree of goodness and degree of pleasurableness might coincide, it is just that once one is free of the fallacy one will no longer see any reason to hold this.