The story has an organic flow to it. The arcs tend to tie into each other in ways that feel natural. The Hermano Castigado arc was hinted at at the very start of the manga, and during the Tournament arc, it was a major part of what Souma and Azami's motivations were.
In regards to subversive elements, they do exist. While I won't go to much into detail, there are moments where things take a turn that you wouldn't normally see, such as working at Diner’s giving you more experience that going to a prestigious school or using ketchup as the secret ingredient.
I think media always tends to use similar elements and take inspiration from other works of art. Shoukugeki no Souma is not a unique collection of elements fully. What it does, however, is use those elements in effective ways with great writing and storytelling. Of course, the anime adds to this with effective visuals and music, but the core greatness exists in the manga.
Perhaps I did not explain everything accurately, or didn't cover everything. I welcome the discussion. But truly, I believe Shokugeki no Souma is a masterpiece.