The "perfect" is not being the enemy of the "good". It's being somewhat antagonistic to triangulating frauds who make pretty speeches based on polls and then actually do what big money pays them to do. Hillary vs. the GOTP candidate is very little difference. We might (not will) get a few frills, and the cost will be that all the right wing bullshit she will pass through will, in the future, if we have one, will be blamed on the Democratic party. But Supreme Court Judges!!! She will nominate whoever she's told to nominate; I wouldn't make any assumptions. Will a RWNJ nominate a neanderthal? Sure. Will she? If big money insists yes, then yes, otherwise she might be decent. Big money may allow slightly liberal people on the SC just to keep the game going longer.
There is a finite chance I may be getting cynical, but I don't think automatically voting D is a panacea when the D candidate has the same paymaster as the R candidate.
Your mileage WILL vary...