Hey @rafalgorka, I was in Budapest very recently and had a chance to go near the stadium (other side of the Danube at Kopaszi gát), so I thought I would share it here.
I took the picture with the shity camera of my shity phone, so yeah, it is what it is. And also, the best view from Kopaszi gát was at an old boat, I didn't plan this to compare the two.
Also, Kopaszi gát was lovely as always. Such a nice place near the stadium.
You get a nice view of the new tallest building of Hungary as well, the MOL Campus, the first structure near the size of a skyscraper in Budapest.