Maybe Hiddink is going to help steady the ship, like you said, and someone like Rijkaard will take over in the summer. That sounds more realistic to me.
At least if they bring in someone like Hiddink who has good enough qualities, then the person who takes over will hopefully opt to build on it. Hence, the Chelsea board will have a lot more time to think over who is really the right man for the job.
If anything, you would feel that the board thinking about the position too much would result in confusion, and during that time we would have to rely on Wilkins, who isn't really proven enough to be in charge.