FWIW, I think Kurt Busch is one of the best drivers on the circuit. He is a throwback to the days when drivers could vent and their every word was not picked up by media and people anxious to deep six the guy. Not that Kurt isn't deserving of the less than flattering media attention, but he is one heckuva driver.
From the owners POV, Penske had no choice and if I were him, would have let Kurt go as well. But with this admonition:
"Kurt, you've screwed yourself at every turn. You've made irresponsible comments, gestures, and moves on the track. You have an anger issue and are long overdue addressing it and making a personality change. There are two paths; one is to continue as you are and figure chances of securing another first class ride are narrowly limited, or, the other choice is to get your personal issues under control and hope someone will pick you off the manure pile. Your choice. Think it over."
Kurt is not done and if, if, he makes a personality adjustment, can be a valuable resource for another team.
As for Sam Hornish in the 22, he's not ready.
Either Stenhouse or Regan would be good alternatives, Regan being first choice.
YMMV.