Bingowings said:

A good director will knock the unsightly from a bad script and add what is missing and fight to keep what works.

A bad director will mangle a reasonable script.

Think Ridley Scott on Alien and Ridley Scott on Prometheus.

Not saying a director is UNimportant, but a good producer and competent director couple put out a great Star Wars.

And what the HELL was reasonable about "Prometheus?" :( The two headed clone of Hitchcock and Fellini couldn't have made that script any good.