I think the real difference between Marvel and DC movies is that Marvel movies are made by Marvel, and DC movies are made by Warner Bros. Even now that Marvel is owned by Disney, they're still their own Pixar-esque fiefdom (for however much longer that lasts). The people in charge of making DC movies are movie executives who aren't capable of creative thinking beyond "we must copy the most recent successful thing".
Also I don't understand the logic that says Superman stories lack suspense because he's too powerful. Did you really get to end of the Avengers movie and think "I don't know if Tony's going to make it out of this one!" The suspension of disbelief is the same. It's fiction, all you have to do to make something that can hurt Superman is say "this can hurt Superman".