I'm not sure that it's a case of the media getting bored with #metoo.
The problem as I see it is that reactions will be subjective and linked to the public perception of the accused.
So far the men who have been accused have been Trump, other politicians (never really popular figures) or older men like Weinstein, Spacy.
Younger men, popular actors with looks and charisma, have so far not really been amongst those accused.
Franco's the first high profile one (that I can think of) and what seems to be happening in his case is that his looks, charisma and his stated willingness to examine his behaviour and mend his ways are playing in his favour
It's that superficial.
Unless the women take this further I think this will evaporate over time.
It's happened before, Micheal Fassbender was accused of a serious physical assault on a girlfriend - this never became big news and has pretty much been erased from public consciousness.
I'm not saying that there isn't space for people to admit the wrong they've done, apologise, show remorse, repair the hurt and damage, forgiveness granted and everyone moves on.
However when there is a pattern of behaviour, denials, no remorse and the hurt inflicted gets ignored and forgotten then that is wrong and can't be accepted.