What does Scott Rudin bring to a show?

With the recent talk (in the Andy Karl and in the Grosses threads) about GHD not doing well and possibly closing sooner rather than later, I've been thinking about the departure of Scott Rudin from Groundhog last June.

What exactly does Scott bring to a show? (apparently not everything, as can be seen from the early closing of Glass Menagerie). Are his changes in marketing? The show itself (the published reports on the GHD departure implied that he wanted changes before the NY transfer but the creatives resisted)? Casting? Cost cutting?

Wondering if anyone has any insight on what he actually does with each show, and also the actual disagreement in GHD, and whether Groundhog would have done better had those changes been made...?

I'm sure he wanted to make a number of tweaks... He is a smart producer and I bet they would've been good ones...

My friend asked me the other week if he would have replaced ANDY KARL.. I doubt it right?

I imagine they must be pretty high, it's a huge cast, lots of tech, and the capitalization is $17.5 Million. They must need to have high operating costs in order to make back any money.

I know Scott Rudin usually does workshops, where the actors rehearse several months before previews begin. He also doesn't even hold any press previews nor a ton of opening night coverage.

Last week I saw him with a cup from Starbucks. Not sure what was in the bag though.