I've been grinding this for my walls for hours... and I had an idea.
After level 30 stoneworking, you can either:
A) Create Hewn stone directly with 4x stone
B) Create Rough Hewn and Hewn stone in 10x amounts, instead of 1x1
Mainly because grinding out 2000 Hewn Stone for walls is really a huge waste of time doing it 1x1 for Rough hewn, and then again for hewn. Pre level 30, it's needed for skill, and should be torture. After 30, it should be less of a timesink.