I wouldn't want to get rid of Petrie until knowing how much control he as over decisions made. Are these all Petrie moves, or just as much Westy and the Maloofs? I don't know, and therefor can't answer.
Me not wanting Westy is based on things we all see. Firing Petrie would be based on speculation about what goes on behind closed doors. For all we know the maloofs didn't want to spend big, and handicapped Petrie in the FA market, and Petrie also could have brought in Smart thinking Westy wouldn't last the entire season. Who knows?