Posted this a bit earlier.
They should've had a scene with Lois after Clark comes back to life where she tells him to go off (like she does in the movie) but have him say something about how he only remembers the world rejecting and hating him just before he died, then she could've showed him how much the world has embraced him and his ideals and how much Bruce changed and became a better person again because of him, n so on. And this way he can finally be the hero he always strives to be. This would've given him more a more natural transition into showing more confidence, you know?