One of the things that are added by Act II.ii are a sense of the power-dominance of the judge and prosecutors; a sense of ultimate unquestionable authority. There is also an underlying mood of intensity among these characters that almost borders on hysteria. This is interesting and adds dramatic impact because it is the girls' hysteria that, seemingly, has caused the troubles in Salem. I say "seemingly" because there was no hysteria involved as it was a cold-blooded plan they thought out.
Another thing that is is added is the loss of the foundational underpinnings of the entire trial. As Judge Danforth says, the trial was entirely predicated upon the "children's" innocence and on the belief they were the divine spokespersons of the Almighty. When Mary comes in and unburdens herself of the horrible truth in a deposition that it was all "pretense," the trial and condemnations and hangings are exposed as felonious frauds.
DANFORTH: I pray you, Mister Parris. Do you know, Mister Proctor, that the entire contention of the State in these trials is that the voice of Heaven is speaking through the children? (II.ii)