Hearthpwn

They should change WHEREVER THEY ARE to GLOBAL. 

Meaning it affects hand, field, "graveyard" and deck.

saves space....

what other key words , text and effects can be changed to free space?

I would vouch for them to bring back the Enraged keyword.

At the time, the decision sort of made sense since it didn't seem so intuitive for players to know what the keyword meant. But ever since they made new keywords, you might as well just bring back Enraged. Manathirst in itself is a confusing keyword and I had to look up the actual mechanic on the wiki to get an understanding of how it interacted with Battlecry effects. 

Enrage, on the other hand, is so much simpler to understand. It activates when the minion is in a damaged state. Just plain simple.

Technically they didn't do away with Enrage entirely. If I'm not mistaken, they changed the word to Frenzy. Same concept as enrage. 

They are not the same.

Frenzy is a one time effect when a minion survives damage. It is like a "battlecry" effect that is triggered on damage (when not killed outright)

Enrage is an on-going effect while the minion is damaged. If it is healed back to full, the effect ends. If it is damaged again, the effect resumes. The effect is more akin to a "condition" than a battlecry.

I may be mistaken but that is how I understand them.

I like my cards to have BIG walls of text. Makes things look much more complex when they really aren't, hehe. :P