What really throws me with the "diorama" title is that this piece in no way looks like a diorama. To me, diorama's include environmental elements, this is just a bust with an arm holding someone, it's more an LSB than a dio. A dio should have elements of the cave or door or something. Even Padme vs Nexu, the column she's on adds evironment and context to the figures, these two just are.
I think a lot of people were expecting a traditional concept of a diorama and are really thrown off by this because it's not.