Stylii are mainly around right now to help give armor a bit more variety via better access to glyphs, as weapons have more variety to begin with and so don't need it as much from enchantments. Their functionality and drop quantity are largely the same as they were in Pixel Dungeon v1.7.1 though, most of the changes you mention are from when vanilla added degradation, which was something I chose not to port over to Shattered.
I do agree that giving stylii an alchemy recipe would be neat though. I've had a few ideas for it, but don't want them to just be scrappable for easy energy.