Your points are all valid, Cobra. When you think of it it's quite an interesting turn because although rebellions and revolts were common in Byzantine history, they tried to avoid them as much as possible by inflicting a level of damage before death, if I can somehow call it like that. In the end, they used all sorts of torture methods and execution, it all depended on how influential or how important the said character was.

Or if anyone wanted to strike an example to the local population.

Blinding was definitely the preferred method, the opposing candidate or troublemaker was still alive and placed in a monastery for the rest of his tragic days.