Other reviews are saying its slow in the middle.
The nature of offence covered in 2nd season needs a slow build-up. I won't give spoilers, but the last episode will be truly meaningful only if the entire season is watched properly. (You can skip some of the jail parts)
Mind-blowing story, acting and social topic. Especially the acting of Anu & of course, Mishraji (Pankaj Tripathi)