Holy mackerel! This can't be right. I wrote something mildly sceptical about artisan soaps recently where I used the figure of 6-8 weeks of use as evidence of their expense, as opposed to many months for a traditional hard milled soap.The part of GD I don't care for is the same issue as others have mentioned, some of the soaps get used up VERY quickly. I reached the bottom of a tub of Aether after 6 shaves with synthetic brush and light loading, as well as a tub of Wonderland after just 5 shaves under the same circumstances
If you look at the ingredients lists of some of these soaps, it's clear that they're edsentially creams in everything but name. Perhaps they should be used like creams? If you were to dig a brush into a tub of Trumpers cream and swirl the brush for a minute+ as though it were a hard soap, I'm sure it would be depleted quickly as well.
If your particular tubs of artisan soaps are soft enough to be manipulated like a cream, placing an almond sized quantity onto a brush or into a bowl, try that.