Ok, I followed your advice, and the result was surprisingly good! I managed to get the consistency of the lather as I like it – creamy but still a bit watery and flowing (I don't like when the lather is too dense). But the biggest gain was in the protection capabilities of the lather, which provided a lot more primary slickness.Blooming should be with hot water.
Is it the blooming that helped so much?
This would explain why some of the Hags soaps I have with the same base felt great, but some felt quite the opposite. I bought the Isla Muerta only because I wanted to try their Bay Rum, but I was hesitant to do that based on the mixed experience I previously had with Hags.