I like the fact that Supes is a good guy, and Cap has overall worked, but I think DC should keep away from any clear comparisons between the two of them. If they were going for an MoS2, I'd have it a lot more low key. No more alien invasions and CGI villains. Just Clark at the Daily Planet, trying to be a good reporter, and Superman, helping the people of the world every time something pops up on the news. I would downplay the whole Lois angle (I think it's been overdone imo), and have her just come in to be a support when he's down. We would see Clark struggle with being torn between trying to do the right thing, and yet not knowing the future of how things might turn out. Like choosing to save a group of people in peril when another group perishes because he was busy at the time. Show the true kindness of his heart, where he's not just saving people, but animals too, and also stopping by to help old ladies get across the road, or plow an entire farm when the farmer is ill. 3rd act could be Lex, or someone else powerful, trying to use his kindness against him, putting him a situation where he might look less than noble, turning public opinion against him. But he ultimately redeems himself, and indirectly makes a fool of the person who attempted to frame him in the first place.
A simple straight forward story with heart would work surprisingly well, and lower the film's budget too.