It's all fairy's fault. Making dragons weak to fairy (in the TCG)? A mistake. Introducing fairy energy rather than making them use an existing energy type? Another mistake. The whole fairy thing is one huge mistake. Mistake isn't even the right word. It needs more words. Boneheaded decision is more like it.
This ties into something I was getting at earlier.
The TCG suffers for its own sins and those of the video games. Poké-Bodies and Poké-Powers were a good split but that had to go away for Abilities, which feel like a step back. The Fairy-Type has to be added because the video games added it. Same for Mega Evolutions.
This also gets back to how x2 Weaknes is just broken. The TCG can handle damage addition and subtraction, but multipliers are too much.