Tinkmaster Overspark is now a 3/3 (up from 2/2) and now reads: Battlecry: Transform another random minion into a 5/5 Devilsaur or a 1/1 Squirrel.
Tinkmaster is a neutral card that silences and often shrinks big creatures. This reduces the amount of big, fun creatures in the environment. We think this change will increase the amount fun creatures in the environment, and bring him more in-line with his cost and overall power. Tinkmaster should still show up in certain types of decks, but will no longer be appearing in every high level deck.

Nat Pagle now reads: At the start of your turn, you have a 50% chance to draw an extra card.
Nat Pagle will now draw a card at the start of your turn rather than at the end. Nat had too much draw power for a card that is fairly hard to counter so early in the game, making it almost an auto-include for many decks. This change reduces the power of the card and gives players more time to counter the card before it starts.