So, 0.8 seems pretty stable, overall. Encountering a few issues, though...
Selling items is like pulling teeth. 10 coins for one bronze axe (bear minimum 21 coins in materials, barring mining), 4 for the next. That required a reset, as I was out of money. Tempering items might make them more valuable, but as I got 15 coins for a bronze dagger with a common hilt, with 100 quality...maybe not. There seems to be nothing in-game that tells you about tempering, either. Also, one person outright ignored the greatsword I made for them.
Smelting works well enough, but two fuel-related problems: removing fuel doesn't stop the smelting quickly at all; usually long enough to smelt a bar or two. And leaving fuel causes it to burn until it's consumed, even after the smelter turns off. I'm not sure if logs have a non-firewood purpose, but I haven't found it if it exists.
I'm not sure about the purpose of the crystals, as the fire and water crystals have no tips. I haven't tested tempering near the light/dark crystals enough to figure out what they do, though the effects are neat.
Non-mined ore deposits don't reset after a game day, so if your mine fills with anything above your pick, RIP mining for a while. Leaving ore on the ground in the mine is a bad idea, as I'm pretty sure it disappears if you leave the mine.
I'll probably mess around in Sandbox a bit more, just to work more things out. Nice update, but all of my attempts at making money have failed thus far. The only profit I've had this update was that dagger.
Oh, so that seems major. There's no such thing as a pickaxe above copper. Making a tin/iron greataxe head instead creates a copper greataxe head. Considering the price of those materials, I can imagine considerable anger upon someone meeting that glitch in shop mode.
Further edit: No, that just seems to happen with all items. No matter what I try to forge, it magically becomes copper. Maybe it has to do with using a copper hammer, but I can't upgrade it if my hammer transmutes all metals into copper. Warning to all players: if you manage a profit, stick to copper. Trust me on this one. I wanted to see what would happen if I smelted tin and copper at the same time, but without at least a tin pick, I can't.