Could this be the reason why Eisner took restricted stock over a stock option?
Generally, if the stock price is going up, stock options are a little better. You can sell both at the higher market value, but with stock options you have not had to commit to the purchase until the stock price reached the point at which you wished to sell.
However, if the stock price stays the same or goes down, restricted stock is better. Since you actually own the stock, it retains some value until the stock price goes to zero.