Some bugs:
-> Create Goblin Brute is available, even if you choose to take Elves path.
-> Read "Blast Away Your Foes With Magic" is available in the library without knowing any magic, and should unlock once you can have magic.
-> Craft Mutagen Potion, says "maybe there is a way to purify it...", but after completing the purify the tree questline, I don't have a way to make further purification potions.
-> Iron Sword(1) appears in Power list in top left. Its the only item I've seen thus far do this. EDIT: Apparently Moon Sword also does this.
-> Fight Giant Leeches, and Fight Floating Crystals both now require 500 power to attempt, when the rewards they offer aren't that great and just feels like a gatekeeping thing rather than an honest challenge requiring 500 power.
-> Fight Zombies requires 100 power. Except to reach them, you have to beat Giant Leeches, at 500 power. So maybe revise them and the rewards they give?