Re: "Joyless" ?
I'd have gladly got rid of some of the fight scenes for character moments, light hearted and otherwise. Joyless does not mean humourless, the scene with Clark and Martha on the steps when he comes home, that had joy in it. When Clark learns to fly, that has joy in it.
But most of the scenes Jonathan are joyless, he's never enjoying raising Clark, he's always busy giving him some sort of lecture. As already stated Clark is just seen as the 5th Kryptonian. I'd have liked to see a scene or two of Daily Planet Clark, just like Batman Begins has a few scenes of Bruce Wayne as a playboy.