User blog comment:QlnwtheOctoGuy/How I fix Galactic Gardens/@comment-31155876-20170812161304

Not to personally offend you but I think you only looked at the stats and abilites and thought "oh man that alone makes it OP." Most of these cards are fairly balanced, with one very obvious exception that you left out for some reason.

Take Wormhole Gatekeeper for example. By the stats alone it seems decent enough, a 3 cost minion with 2/5 and Bullseye. It also has the ability to draw an extra card for you each turn, but also an extra card for your opponent. This can result in  as your opponent has a chance of drawing more cards and getting more support, especially if they lack easy ways to draw cards. They may also play Bananasaurus Rex, which gets an extra boost each turn from the extra card they draw, or Sow Magic Beans, Moonbean, or the notorious Clique Peas, which actually benefit from more cards drawn. Also, referring about the zombie's stats again, this zombie is vulnerable to Whack-a-Zombie, which can be played the same turn this zombie is played. This fact is not help by the fact that this zombie also comes from the Brainy class, meaning its strength can only be normally boosted by Prof. Brainstorm and Immorticia (or any Brainy hero, but only if you're lucky with Trick-or-Treater or Mad Chemist). This card is one of the many examples of how other cards in the game can balance out their seemingly powerful abilities.

tl;dr most of these cards have more depth to them than you think due to other cards "clashing" with them, which actually makes them balanced in the end.