Well, primarily Israel but secondarily everyone.
But the Book of Ezekiel does not explicate ma`asey-hamerkavah. That belongs to sod, the "secret" aspect of Torah.
It does not explicate something in order to hide it or because it cannot be explained in words?
Here’s an example. I believe that there is a meaning in Orthodox icons that cannot be expressed in any other way but through the icons. If one asks, I basically wave my hands in the air or pile up words that means something for me, but mean nothing for the questioner. But, I would like to explain. Likewise, the iconographers try their hardest to explain, this is why they try to write truer icons. Their meaning is inaccessible to very many, but it is not a hidden meaning.