NYT Makes A Surprise Change; What's Up?

Hmm.  This is a pretty unusual move.

New York Times executive editor Jill Abramson is departing the paper, effective immediately. She has been replaced by former managing editor Dean Baquet. The news broke on Wednesday, exploding across Twitter and yielding a Times article that itself expressed confusion at the development.

As photos from within the stunned newsroom spread online, it became clear that Times publisher and chairman of The New York Times Company Arthur Sulzberger Jr. was behind the switch. “Arthur made the decision because he believed that new leadership would improve some aspects of the management of the newsroom,” a company spokesperson told AdAge.

“There is nothing more at issue here,” Sulzberger told the newsroom, according to CNN host and former Times journalist Brian Stelter.

And by 'nothing more at issue here', I presume he meant "there is with absolute certainty something more at issue here".

But what?