in Nagabank, you get gems.
In the next version, for example, you could disable the map generator, and in the witch's hut, you wouldn't automatically get the skill, but rather acquire it for 500 gold. Although, I don't know, it might radically change the gameplay :)
Yes, the changes will affect the swamp and dungeon. I still prefer sulfur in jars; gems are already plentiful in the leprechaun gardens, which is more than enough.
In any case, it's not the first, the number of minor bugs fixed in HD+ is quite large.