Card back changes really?

[BurntTech]

So it appears that card backs do change. I'm sure at the time there was a good reason to make them look different over the treasure cards. Most complaints about card backs are about the printer differences over the years giving off slightly different colors. One could argue new expansions aren't compatible with the card back change. You can see the change in the image link below on the Brown to White card change.

http://i.imgur.com/gGr31kY.jpg

The bad part is if you just bought 4-8 about half your cards are the old style and the other half new style. The options left are to play and people know if its set 1-3 or 4-8 or spend 40 dollars and rebuy 1-3 or spend over 40 dollars to sleeve all sets 1-8. Costly lesson I assumed wrong since most CCG don't change their card backs like MTG for the last 20+ years... I hope this saves someone the trouble or money for a non communicated change.