To be frank comparing the throne to say the Herdstone, Feculent Nurgle tree, Loonshrine, and the gloomtide, it is probably the weakest terrain feature design-wise.
But in the end it just a terrain feature, it just there to sit still and look pretty while giving you free buff. it not meant to be this piece that display amazing CAD sculpting technique and be the centerpiece representation of your army. it just there on the battlefield because you are heavily incentivize (almost force in a way) to field one
it just the lack of anything new and interesting that maybe it lackluster show a bit more but don't blame the throne for it.