Honestly, Shanghai making Numbani close was already quite an upset, but them taking a map? Stunning.
Say all you will about "oh Seoul used a meme roster" or "Seoul threw", Undead and Diya actually got kills, Roshan and Xushu engaged MUCH smarter, and support ult timing was overall good. Seoul's worst possible line up is still probably able to stand up to Houston or Florida, whom are teams that effectively stomped Shanghai just a few days ago.
Comment not directed at OP.