Good point on the too many chefs issue!
What about DC comics? Bleeding Cool's power list makes the observation that DC's co-publisher, Dan DiDio, is very hands on:
The Bleeding Cool Top 100 Power List 2015 #2: Dan DiDio
...he has become incredibly hands on, micro-managing and changing whatever he can to find what works. Even during the Thanksgiving holidays, creators were finding themselves hired and fired, at least one abandoning dinner to work on a cover that was needed right then. ... Dan DiDio has far more of the creative power and influence of the company concentrated in one person. For better or worse, it’s DiDio Comics.
http://www.bleedingcool.com/2015/12/...-2015-4-to-2/#!
This isn't the only source about excessive putting of "fingers in the pie" so to speak. For years fan favorites (at least to some) Cass Cain and Stephanie Brown were banned from use. It was nuts. Some art was done meaning to be Stephanie and it had to be recolored since she was persona non grata at the time.
I only think we got Cass Cain back because Mark Doyle joined as the Batman group editor. Right after he joined, Stephanie Brown had a cameo in Batman and then she returned completely in Batman Eternal. In the next weekly, Batman and Robin Eternal, Cassandra Cain returned. Is this coincidence or did Mark pivot DC?
One possible explanation that jives with reports of Dan being a micro-manager is that Doyle made his being the "true" editor of the Batman titles a key requirement for taking the job. He didn't want to be the "editor in name only" (EINO?) with DiDio still actively vetoing or pushing this or that in Batman books.
When Doyle was announced at the Bat group editor, Scott Snyder tweeted lots of praise and was very positive. Now this could have simply been marketing or it could have been sincere. Maybe Scott had talked with Mark before and said "I'd love for you to come to DC but Dan runs the Bat group with a strong hand and I've been stopped from using characters for my stories on several occasions."
So Mark could have been warned, negotiated accordingly, and Scott was genuinely thrilled to get a real editor who would let him create the way he wanted. This is just conjecture based on various statements and opinions. But it's sorta Occam's Razor - simple, not complicated, and believable.
No matter: what I most care about is the return of some fave characters of mine (Cass, Steph, JPV) and stories about them that I already like (BRE!). Putting these faves into a new Rebirth book is just more than I'd ever hoped for. So thanks to Scott, JTIV, Doyle, DC, and, yes, thanks even to Dan DiDio!