Thanks for taking time to read and reply to my comment. As for the New Testament, I'm pretty sure it'll get anime adapted eventually (I just hope soon and that it turns out good.)
Most of the novel readers think that Index III adaption was very bad. Adapting each volume in only 3 episodes was a very bad decision because the skipped minor details are what made the novel good in the first place.
There are arcs in the future that will be very bad if they skipped the characters internal struggles.