Yeah, it could be just another spit in the hurricane at that point, and the Right simply doesn't see that.
Plus, the nature of the allegations may be too vague for many, or they wouldn't see why they should care.
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I don't think anyone on the right is planning to vote for Hillary no matter what. They may not vote for Trump, but they'll definitely not vote for Hillary.*
I think the autopsy of the general election will show that a lot of registered Republicans sat it out. They'd rather let Hillary win than vote for Trump. They'll be able to say that they didn't vote for her and leave it at that, allowing them the luxury of complaining about every utterance and move she makes for the rest of her life.
*I also suspect that there will be a significant number of women voters who are denigrating Hillary in public who will be voting for her in the privacy of the polling booth. "Of course I'm voting for the Donald, Bubba!" Yeah, right.
Watch for unexplained discrepancies between exit polls and vote counts favoring Hillary. The GOP will scream "election tampering!" but we'll all know the real reason. A lot of people on both sides of the spectrum think we need a woman in the WH.