Yes, I agree 100%. Focus on getting the stuff you have already, working 100% first and foremost. However...

There are more than just ONE group of people within any game development team, each group focusing on different aspects of the game development. What i'm trying to say here, is that theres a difference between the "bug crushing" group, and the "content developer" group. They are not likely the same group, so having 1 group work on creating additional content, doesn't take away from Cryptic's group working on fixing bugs.