The longer he stays, the less likely he is to work in the Premier League again.
Ultimately its not working. Managers, like players, have a glass ceiling in terms of ability. Look at Mick McCarthy. Excellent Championship manager, but not cut out for the Premier League. Lambert just isn't cut out for Premier League management.
He should've had the balls to walk away in the summer and go to Celtic, but now we're seemingly stuck with him for god knows how long cos RL won't sack him. I'm losing count of the amount of records he has to break before RL decides enough is enough. As a scout, he's decent. As a manager, he's awful.
I don't think we can keep talking about 'give him til X' anymore. He's had more than enough time, (and money), and its just not happening. Of course its a risk getting a new manager, but its a risk worth taking, cos lets face it, its take a risk or keep putting up with the utter drivel Lambert is gonna keep serving up every week.