I keep hearing people bashing the studio because they make too many cuts, as was the apparent case with BvS and now SS.
I feel like it's not the studio's fault though... if the writer/director can't sum up the movie in a normal amount of time [for a superhero movie] then maybe they're failing. The Ultimate extended cut of BvS is 3 hours long. I rarely watch the credits roll in a 2.5 hour movie and think, "Man, I could have easily sat here for another 30 minutes of that." Sadly the extended cut of BvS has parts of scenes that actually make the movie more coherent, but not a better movie. If the writer/director can't tell the story in 2.5 hours without leaving people scratching their heads, they're failing at their job, no matter how many explosions and punching and flashbacks and scenes too dark to even see what's happening the movie has in it.
BvS doesn't suck because too much was left on the cutting room floor. It sucked because it was a rushed, forced, pretentiously bad story with a subpar score and questionable casting. They assumed they didn't have to do any world-building because we all Batman's origin and the other characters will fall into place in the next movie which looks like it'll be an extended recruitment montage scene more than anything else. Had they chosen better people to write it and direct it, that might have been the case.
It's hard not to throw Marvel comparisons into these discussions, but they have awesome directors and writers that get it right. Zack Snyder would never make the cut for the MCU. He's had some decent movies with Watchmen, 300, and arguably Man of Steel (I still enjoyed it despite its glaring flaws), but his style doesn't fit every mold. It should, right? He's got a comic book vision and style... but it still falls flat. Same with David Ayer. He's got a decent resume, Training Day being his best writing credit. His directing credits are decent but kind of forgettable movies.
If Snyder is DC's Joss Whedon, they'll be rebooting again in <10 years. They'd be better off pulling the people that make the DCU animated movies to do the live action ones.