If Holmoe decides it's time for a replacement, conducts an aggressive search but doesn't find good candidates, then it's an appropriate argument for not pulling the trigger this year.
It's a bad argument for fans that want to squelch conversation on a sports forum.
I like the idea of Rose and Holmoe having a loooong, candid talk out of the public spotlight, decide when the change will be made and spend the money to bring in the right assistant coach to be the heir apparent.