Firing Petrie is an interesting situation. You would have had some merit in suggesting that 2 years ago but in the last couple of years he has pulled all the right moves. He drafted Evans and Casspi, traded Martin's long term deal for Landry's expiring and cap space (and Landry has stunk it up this year). Traded Nocioni and Hawes for a much needed Dalembert and drafted Cousins and Whiteside.
Those are all some good moves for the stage of the rebuild that we are at.
We still have a lot more talent and should be a much better team than our record suggests. The issue is that the team has simply quit on coach. Firing Petrie now would be similar to firing Adelman back in 2006. That was a wrong move back then. Petrie has had some terrible years but in the last 2 year he has started to do the right things and I am not sure if firing him now is the answer and most certainly not to get Whisenant into the Kingdom. What is the fascination with this guy anyway?!?!?!
Westphal on the other hand is on his way out. Picking up that option on his last year was a mistake. You should never over-react and pick up an option on a coach during, or just after his 1st season with the team. Even Theus was good in his first year and then it all went downhill since then. Its exactly the same script with Westphal.
He needs to go because he has lost the players. The next coach needs to be someone with a proven track record of developing young players and fine-tuning them into a productive team. No its not Whisenant and no its not Brown. You get what you pay for in life and especially in professional sport. If you want a top coach, you need to pay the top dollar otherwise you are not going to get anything good.
I think firing Westphal at this point is well overdue but not so certain about Petrie. He has had some terrible time at the kings but in the last couple of years he has started rebuilding this team the right way. I would give him until the end of next year and if things have not improved significantly, its time for some fresh blood!