I have no clue what they were thinking but that was a load of you know what in my opinion. The manga was a million times better and that's seriously an understatement. They literally just took out one of the best fights and character depth in a lot of them to be honest.
But that acoustic version of Unravel was a nice touch on the last episode I have to admit.

Also I'm sorry to whoever likes Touka but DAMN her attitude just sucks, I can't stand her. I liked her at the start, she was cool but oh my lord. Just stop.