I left the halo on mine. Seemed to me to be a feature of the throne, not packaging for it.
I started trying to remove the black plastic, decided I needed to give it some more thought, and set it aside. It's still sitting aside with the black plastic attached. I don't really like it that way, but it's roughly item #729 on my to-do list. And I keep adding new projects faster than I check any off.
I left the hall on as that's the part that stores the Titan Masters.
Now I'm imagining the throne sitting at the end of a Hall of Titan Masters. Nice red carpet lined with marble pillars, with a severed head mounted on each. And the halo of Prime Masters behind the throne throwing off random bolts of energy, further scaring off any who might think about approaching.
I'm just not sure how to tie all those elements together thematically. I mean, the vine-covered metallic throne would seem a bit out of place in that setting. Seems like the throne oughta be out in a jungle somewhere. Maybe mount the heads on pikes instead of pillars? And I guess a river of dried Energon from Primal's enemies instead of a carpet?
Still seems to clash a bit. The severed heads are really more movie Prime's thing.