Voting for Gorsuch is not going to get you any special favors two years from now when your opponent will be saying the same thing but more intensely. Voting against him will be a blip on the radar by then to most moderates, but it won't be forgotten by an enthusiastic Democratic base. You will end up losing more in demoralized core support then you will gain by pandering this far out to a disinterested and short-term memory abstract centrist voter.
What Democrats should be doing IMO, is taking cues from the Republican party, create a rhetorical message that plays well in these vulnerable spots but is poised to be a tough sell after two years of Trump(think harming the working class, taking away their healthcare, Un-American activity, Washington corruption, disregard for veterans, infrastructure spending) but still fits in with the movement. Influence, don't try and demand control.