As for Mr. Mantello...
I think a major part of the issue was/is whether or not a "local" audience would be able to tell if a director's staging and choices were solely his own or if they were borrowed from someone else's staging. -And, consequently, whether the critical praise - or brickbats - would be bestowed upon the "local" director for his innovation - or lack thereof.
Yes, actors will always "make" a different show - even in "original" productions when there's a cast change - or even when an understudy or stand-by goes in. But when a director just ends up copying someone else's direction... Is it really directing? Or does it become staging at that point? Recreating?
In the opera world, there is a lot of "Original Production by... This production restaged by...." going on. They acknowledge the original director, and also acknowledge the current "director" - the staging director. Heck, even stage managers even end up recreating the original director's staging regularly.
Yes, "direction" is essentially ephemera. The printed word is not. But how would you feel sitting in a theatre watching a show, and realizing, "Hey, I could have done this!.... WAIT!! I did do this!"
*And... I really should try to look up the exact details of the Mantello case... I believe the staging of
L!V!C! even had some of the same scene changes duplicated - including the lighting cues.
**On a very personal note - There's a sort of prominent director that I've worked with a few times over the past couple of years. His work has gotten praised for his "innovation", "resourcefulness", "craftiness", and "originality". However, there has been more than one instance where his "originality" has been praised to high heaven, and I find myself saying to myself - or even screaming to myself - "Didn't you see the production in London last season? Didn't you see the production off-Broadway two years ago? They did the same thing!?!?!?"
And others I know have been saying the same thing. It reminds me of NBC's catch-phrase for their summer reruns, "It's New To You!"

Praise is good. But I also believe it should be it should also be due to whom it is really due.