2. Life Tap hasn't been a big Issue since the game launched
and most importantly 3. The Patch will guaranteed contain more than just the set and this "leaked" change. They already announced that the BG skins will come with the patch aswell as a new duels season.
Also: How does it feel opressive or unfun to plays against life tap? lol
Very poor fake. If anything, they will probably have to buff Warlock shortly after the expansion comes out, because Handlock (which they are clearly pushing) doesn't look good, neither does Zoolock. My only hope right now is for the Questline Warlock, but I'm afraid it may not be good enough because of how strong aggro is nowadays.