Responses
Empress does not holf the same amount of power as the queen.
I'd like her to be the empress, but current king can't do that now, since she is a real threat to the throne. I think empress is equal to emperor maybe? Becasue if it is equal then the only thing different between them would be that the prince was born as a royalty from the start. And since Tia is known to be a perfect empress, maybe there would be more people with her and she would become even more powerful than the emperor of royal bloodline? Maybe that is current emperor's concern.
Not sure though.

Everyone seems to forget that Tia wouldn’t be the Empress, only a Queen. That is honestly an insult to her and I still can’t understand the reasoning.
- she’s in line for the throne b/c she spoke to God. The royal family fears her overthrowing them so they wouldn’t make her and Empress, only a Queen (with less power?). WHY? JUST MAKE HER AN EMPRESS! She deserves that much.