I'm just tired of the dark and depressed. Tired of films being grim and dower, especially blockbusters. Sure, they have their place, but if I'm gonna watch popcorn fare, I want it to be fun. Sure, you can have some dark elements,but I'm just so weary of every superhero film trying to be The Dark Knight.
And the guy they hired is a comedy director. I'd much rather see him flex his comedy muscles in this film than make just another Nolan wannabe superhero film. I'm guessing Marvel saw how well people reacted to GotG and decided to take more of that tone. I'm fine with that. Let DC be brooding and dark while Marvel has fun.