I don't know if it's normal but when I tried to feed multiple meats to my already evolved companion it could evolve again on the soulstone, but when I did, it jsut got reset to level 1, I'm fairly sure it's a bug since I didn't notice any augmentation of it's damage.
Also there are some thing that are a bit frustrating, the stacking of the card for example, when it's not compressed, my character and my companion got inside the stack sometime and while they could still be moved, it was just a little bit harder, wich is fine for a demo but I hope it won't stay like that for the full game.
There was also the transparent card (for when there is no card on the plate) that sometimes got out of the stack and I add to get it back inside everytime.
Aside from these issues, it's still a great game, I love the concept. I got all the achievement and crafted all the weapons, I can't wait for the full game.