Hearthpwn

Blizzard could do a lot more to help low budget players out and if they gave better ways for people to get started more people would end up invested in the game, meaning more people buying packs and a better experience for everyone. More people are going to get invested and pay for cards if they feel they want to spend money vs feeling they need to spend money to win I can think of three changes they could make to help new players out without any real trouble.

-Give very bad spellbound, common, and rare cards buffs to make them playable in line with power creep. This doesn't impact the game for players who have paid for cards they can build a deck around but as more and more expansions come out power creep is going to increase and while ultimately insignificant the way they came out with ice rager and evil heckler instead of buffing the original cards is a little worrisome and could come off to newer players as a dick move. 

-Add static gold quests for leveling up heroes between 10 and 20. This idea comes from Blizzard's other free to play game. If someone is starting to get financially invested in Hearthstone they will likely start by going for the cards they like in one or two classes but the daily quest system gets in their way of investing and feeling rewarded with the one deck they really want to play. 

-Allow for a limited amount of giving between friends. Pandora's box.