Seriously, anyone who is opposed to the squish is an idiot. My fear is actually that they won't take it far enough. Think about it - how much more awesome would the game be if suddenly all of the content from previous expansions became available to do without being completely trivialized by you being so stupidly OP that you can one-shot everything and never even take damage?
It would be so much fun to go back and duo Kara, for example, while retaining some semblance of challenge. Or to organize a small group of 3 or 4 friends to go take out Icecrown.