re: Why didn’t any of the women come out against Moore during the primaries or before?

The timing seems to be the key but the strategy is to get the claims out into the media, thinking a lot of people will now doubt him (not that he seems to be the most stable and wonderful candidate). There is no burden of proof, no rules of evidence and no opportunity to confront the accusers. This is not about whether he did it, it is about putting doubt into the minds of some of the voters. And, of course, in the current environment, on any sexual type claim, the accused seems to be, in the media including facebook and similar sites, guilty until proven innocent.