I like balance changes but seriously, if you need to nerf a card by making it 2 mana more expensive, you are doing a poor job at designing it in the first place. Sure, sometimes the true value of a card is hard to calculate, especially if it has a crazy or yet unexplored effect, but bumping the mana cost from 3 to 5 means that the original design had no proper value evaluation behind it. If it had been properly evaluated, the original card would cost 4 with nerf to 5 due to mistake, or cost 3 with nerf to 4. Same goes for Chrysalis burst, bumping it up 2 mana means that not much thought had been put in the original design.
I love balance changes, but only when they are small, such as with Meltdown or Variax, because the Value of a card can oftentimes be hard to evaluate right of the bet, and thousanda of games are needed to see it’s true strength. When CPG changes cards slightly, it just means that they made a small error calculating the value of a card, but when they make major changes, it just shows that their design philosophy is flawed.
Anyway, IMHO, CPG should take another look at their design philosophy and update it, as it is clearly flawed. Im saying this not to bash or hate on cpg, but to hopefully help them create better decisions right of the bat in the future.