Density said:
Don’t kid yourself into thinking it’s all on the filmmakers. The formula is specifically designed so that their films are indistinguishable from one another. Quick, without cheating, who directed Captain America: Civil War? You don’t know and you don’t care because it doesn’t matter. It’s a product first and a film second.
Not that you were asking me but the Russo Brothers. I know that because I do care and so do they. They’re doing far greater things with Marvel than Joss Whedon did with the characters.
Marvel puts a lot of faith in their filmmakers. They’ve had hiccups in the past (Edgar Wright) but on the whole they rely a lot on the directors they hire to set the tone and direction of their individual films.
Guardians of the Galaxy is without a doubt, a James Gunn film. Thor: Ragnarok is shaping up to be a thoroughly Taika Waititi film with all the funny quirks that entails.
Likewise, the Russos are proving to be very capable at creating Action Thrillers.
There are the occasional paint by the numbers productions that pop up but to say that all of the MCU is the same is patently false.