Quest Mode : Questions

Well I tried Quest mode for the first time yesterday and I have a couple of questions and some arguments on it.
1) Prices are not balanced.
Well sure rare golds are more expensive than commons, etc but does it seem right to you that a booster costs 600 coins and winning a match yields only 25 coins? Yes I know this can be adjusted in the settings but what satisfactory settings do you guys use?
2) Difficulty
I put the difficulty on medium but till now all I see so far are (easy) opponents. Does this change later on? What about challenges? How do you find them? Challenging?
3) Land Cards
Land cards are limited in the starting card pool and also in spell shop, having only 5 land cards of each color... any solution for this? How do I get 20 lands for my first deck?
1) Prices are not balanced.
Well sure rare golds are more expensive than commons, etc but does it seem right to you that a booster costs 600 coins and winning a match yields only 25 coins? Yes I know this can be adjusted in the settings but what satisfactory settings do you guys use?
2) Difficulty
I put the difficulty on medium but till now all I see so far are (easy) opponents. Does this change later on? What about challenges? How do you find them? Challenging?
3) Land Cards
Land cards are limited in the starting card pool and also in spell shop, having only 5 land cards of each color... any solution for this? How do I get 20 lands for my first deck?