I'm sure this question has cropped up a lot on here, so I'm sorry about that. 
If Russell T Davies' was due to leave anyway, then why did he suspend production on the fifth series? Isn't that a bit like stealing a piece of someone's cake but not eating it?

If Russell T Davies' was due to leave anyway, then why did he suspend production on the fifth series? Isn't that a bit like stealing a piece of someone's cake but not eating it?
