I'm not too familiar with the comics, so i couldn't judge on the authenticity of atlantis on screen. However, some scenes looked like a dry sound stage with cgi wavy hair - there was one scene were we see the army and we see corn rows and that's cool but then it cuts to some dude with short fluffy hair.
I would have compromised and have atlantis be housed in large glass like domes, dry under neath, perhaps with waterfalls and vegetation etc and also caves, large caverns that have cities inside and their own eco systems, which we know exist. I then would have had scenes of them in the water and made it look as realistic - they communicate through clicks - similar to dolphins and also sign language but they have evolved to use gills and breathe under water and withstand the pressure, temp and low light. I would have also had large strategically placed gold orbs or a thousand pearls together to form one giant pearl which the sun light hit and it casts a spectrum of light across the city giving it colour.
Under water volcano's, the lava leave tubes and air vents to the world above, i would have incorporated that.
Thing is, when you connect this trailer to the world of MOS and BvS you kinda think.... hmmmmm ok - it's too fantastical too soon for my own preferences - however, Mamoa looks awesome and he looks like he is enjoying it and feels so comfortable in it, which is great.