So lets see Liefeld goes through multiple editors and then when he still cant get his way he walks. I wonder who the "problem" employee is. When you work for someone you do what they tell you.
Yes, BUT, when you hire a creator (a term loosely applied to Liefeld) you are getting what THEY do. You are hiring them because of what THEY bring to the table.
You don't hire Picasso (I know, I'm talking about Liefeld) and then make editorial trouble for him.
If you want someone to do your bidding, you don't need to hire a name. There are plenty of people who will work in comics. This isn't the era of comics 40 years ago. Creators have names, and names bring in $$ for the publisher.
That said, Morrison is probably not getting the same troubles from editorial. Either because they have chosen not to edit him, or because he's good enough he doesn't encounter the same problems.