Metropolis obviously should be the modern scyscraper city. It should not be all lights and happiness, but obviously Metropolis needs to be 'rebuilt' and i'd say it can be rebuilt more futuristic, and have the imhabitans be 'uplifted' 'motivated'.
Gotham is the dark world, the Nolan films imho embraced the feel perfectly.
Buildings with gargoyles, scarred, fogged. Less crime because of Batman having done his work good enough [ it doesn't need to be crime-free, just excessive-free], but never enough to keep it crime-free, which wears on mr. Wayne. Unfinished buildings.
Metropolis should be an uncomfortable place for Batman, and Batman should be mad at Supes for destroying or allowing half of Metropolis to be demolished in their brawl. Something with "Protecting your loved ones. how are you gonna save humanity if you destroy their world".
Batman's "home" is dark, gritty. Film noir-style, almost Sin City style. Superman should not feel so much at home there, and should judge Batman for leaving a city to decay instead of finishing his human obligation; not just to destroy crime, but to make it a better place.
It should imho therefor be like night & day; Metropolis is the day, Gotham is the Night.
Is this for real?

I'd say you are going to say something I recommend you to do it with some base my friend.
When did Superman destroy half the city in the brawl? That's pretty nonsensical and talks bad about you, either as a sheep that misheard something and continues repeating it or simple not knowing **** about that specific topic.
First Metropolis was pretty big, not all the city was damaged (IMO it was only 1/4 of the city if you see the aerial fight between Zod and Supes) as you may have noticed if you saw the movie.. Then haven't you seen that the World Engine-Black Zero did the damage? and even if you said about the damage, Superman couldn't do anything because he was stopping the menace that was causing all that at the other side of the world. He's not omnipresent as some just want to see.
Notice what I'm going to say below is not directed to you at all... I really need to say this to complement that idea.
I keep questioning the guys who pretended that Superman, a novice that wasn't in a fight before, those guys who want him to deal and putting an uncontrollable Zod out of the city and let's be honest some just wanted him to do everything at once, (noticing that the part of the city that was damaged, the buildings near the incident were empty, and Zod can just be back and doing more damage by just knocking him or escaping from him, Supes needed all the attention to stop him before he could do more damage, from the speech he told Supes) and yeah I need to question besides the easy one, why asking FOR EVERYTHING to a guy in his first experience as a superhero dealing with a massive threat, have they ever been in a fight before? do they know what happens in the surroundings while they are fighting, everything happens so fast, you don't have time for thinking different options, more importantly when you don't have experience( he never need to learn from it, until now) and you're just trying to defend the human race with your balls and courage because that's the thing he's chosen and he proved since the beginning his first appearence on the movie, you have to be focused of what you opponent does or tries to do.. You lose focus, you lost the battle.. Even more if you are not experienced and you haven't fought in your life with that kind of opponent... Geez.
Also I really wonder if they have ever read Supes comics... cause even in the animated series, casualties happened. But as the movie did showed, there were survivors... that's the whole point of it... courage in disasters, it has happened before even in real life
Yeah maybe the same guys that think Superman is a 24 hours service-guy that knows everything
Let's be honest here... In every story, even at war, there are casualties, let's not pretend it's a fairytell that everything is perfect, nothing bad happens, if some people are ok with it, it's ok, but don't pretend that it's the way as it should be when that type of threat attacks nor when two titans collide. They just need to see how the world goes around to know a little something.. it's not as some media sell it to us. Really.. That's what I liked about this movie, they put a realistic scenario with this comic book character and the consequences that would happen if those aliens were really around us with that type of power and intentions. It's the point of this grounded universe. I respect other intentions of this but those aren't the ones that all needs to like nor the only ones used.
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And no, Gotham wasn't Gotham in the last two films of Nolan, No matter how much I loved the TDK trilogy.. IMO of course.