I think one of the things from the original toh bible that I'm glad was changed is making Belos the emperor himself and not someone manipulating/co-opting a "rightful ruler's" will.
The way Belos warps the "Titan's will" in the actual show is directly akin to religious colonization and manipulation—imposing a god figure and then saying you're the sole voice of said god, as a means of control. Meanwhile, Obron is implied to be using the will of an actual tangible "rightful" monarch to enact control, not an intangible god, which removes these themes and could easily just end up falling into the trap of "oh no, it's just the wrong person in power, nothing is wrong with the actual system. Monarchy/empire is fine actually with the good guy in charge".
Of course, I trust the toh team would have pulled it together somehow if this wasn't changed. But Belos both being the actual emperor himself, and also creating the whole empirial rule & coven system himself, is such a more succint way to directly position the systems of power—not just the man in charge—as the fundamental problem.