Marcus H was right; Index III was a monkey paw's wish come true. I'll confess that I stopped watching at Episode 4 when all my hopes for the series flowed right into the gutter. But the writing was on the walls from Episode 1 and even during the lead up to the premiere.
All of Index III's troubles come down to this: gross-mismanagement at all levels of the production. Not specifically a budget issue like some might say.