First Joshua Fialkov quits the Green & Red Lantern books because DC was going to force him to kill John Stewart, then Andy Diggle leaves Action Comics before his first issue even comes out. No reason was given for Diggles exit, but man...you don't just walk away from writing Supes unless something bad is going down.
DC and Marvel have both been bashed for how they treat their creative teams in the past, but this sudden spike has me concerned. I thought we were moving past this.
My advice to DC is "let the writers write". Because heroes are only as strong as they're written. And when you think about the DC titles and storylines that made the biggest impact (Dark Knight, Watchmen, All-Star Superman) - how many of those were micro-managed by corporate? I'm guessing none.