Pokemon Expansion Mechanics ... Love/Hate?

So the card game has changed so much since any post was made here last xUx what new features do you guys love or hate? Here are some newer rules and/or additions to the card game:

Break Evolutions
 Re-release of Gen 1 Cards
 Mega Evolutions
 Full Art Cards
 All Gold Holographics
 All Rainbow Holographics
 Dual Types (old concept, but they brought it back for newer expansions)
 GX // EX (ex's were also an older idea, but they brought it back)

I like break evolutions, but I think they still needed some work.
GX's were more the style I was hoping they'd go. If you're going to build up a Pokemon through multiple stages, the final result better be more powerful than a general EX. Most times stage 2 Pokemon are pretty underwhelming. You only give up 1 prize, but the effort you go through for it just isn't worth most times.