Of course, Blizzard is free to make decisions as a company independent of what its players have to say, but we do carry a lot of influence. There is no doubt that game quality for Warlocks, perhaps even for other classes, will decrease with Xelnath being gone. There is going to be no one sticking up for us anymore for the next little while. This is BAD NEWS.
Speak out on the official Blizzard forums.
US THREAD:
http://us.battle.net/wow/en/forum/topic/6933836292#1
EU THREAD:
http://eu.battle.net/wow/en/forum/topic/5723494340