Feedback on potion limits and lack of healing magic

I'm about 20 hours in and I have to agree that the potion limit is starting to seriously detract from the fun of the game. I think replacing healing spells with potion slamming *could* work, but why such a low limit?  Especially since you don't regenerate health AT ALL in the field. What's the point of huge, open world zones where you are free to explore... then forcing you to return to camp every 5 minutes for potions? I don't understand what this adds to the game.