OP is pretty condescending.
Damn straight.
Let the panic spread and spread until she's won outright. That's what I say.
Having the feeling of being behind doesn't motivate voters to turnout. Having the feeling of being ahead, however, actually does motivate more people to turnout, in part because people generally want to vote for a winning candidate. Your overall premise is flawed.
Also, let's dispense with the sh-t about "not needing" even a majority of the battlegrounds. That may be technically true, but for those of us who actually have hopes for what comes beyond November, running up the margin is important.
It's both technically and pragmatically true. "Running up the margin" in a presidential election only matters within the confines of popular vote (skeptical it even matters there), and that definitely isn't going to happen with this electorate. Only poli-sci nerds and Atlas Forum members care about the EC margin. The only "running up the margins" scenario here is one where Clinton sweeps the swing states but wins the PV by a modest amount, like in 2012. Ask the President how those massive mandates worked out for him.