I have no opinion of MF, other than that I think the 911 call seemed completely appropriate to me. She was put into that situation because JY called her and asked her to go to the house.
At this point, I think pointing the finger at MF is a disservice without some type of substantial, objective evidence. And no one has presented any.
I am coming around to believing JY is innocent because the evidence points away from him. The "bad husband must have done it" crowd are bending over backwards to try to fit unrelated events into a narrative that simply doesn't make sense. JY has an alibi that has not been remotely disproven. In addition, I cannot fathom that there would be no physical evidence connecting him to the crime had he done it, given the nature of the crime (blood, fighting back, etc).
And none of that has to do with MF.