So using the Premier League as an example, lets look at the managerial departures since the end of last season.
- West Ham United sacked Gianfranco Zola and replaced him with Avram Grant.
- Liverpool sacked Rafael Benítez and brought in Roy Hodgson from Fulham as his replacement.
- Fulham allowed Roy Hodgson to take the Liverpool job and replaced him with Mark Hughes.
- Martin O'Neill resigned as Aston Villa manager just before the start of the season, and after allowing Kevin McDonald to take caretaker charge to prove his worth, O'Neill was eventually replaced by Gérard Houllier.
- Newcastle United sacked Chris Hughton and replaced him with Alan Pardew.
- Blackburn Rovers sacked Sam Allardyce and after one game in caretaker charge they give Steve Kean the job until the end of the season.
If you're wondering what my point is, regardless of the reasons why each individual manager left their post (by resignation, sacking, taking another job etc) have their replacements fared any better? You can argue quite easily that none of the Premier League managers are doing a job of a similar standard or a better standard than their predecessor. But then again you need to give some of the newer faces a chance.
I just thought i would highlight how the new Premier League managers are faring in their respective jobs. I could've done more information, but i'm very tired.