Would it actually help the U.S. if Hillary contests the 2016 election?

Yes and No.

Everyone already knows (unless they believe in conspiracy theories) that Hillary won 5 million more popular votes than Trump. So, from the average person's perspective Hillary already won the election already not Trump.

So, the average person thinks Trump is a technicality, a fluke like Bush II was in 2000 one year before 9-11 which likely happened partly because of that technicality of him not really winning that election either. Because Gore won more votes in 2000 than Bush did too. So, this is the 2nd election stolen away from the American people's actual wishes since 2000 already. Both elections were sort of Fascist and not democratic in this already which likely makes the Nazis and White Supremacists very happy by the way.

So, would it actually help if Hillary contested the 2016 elections?

It could be helpful but it could just as easily start a bloody civil war in this country between white supremacists and everyone else.

But, we'll have to see what actually comes of all this won't we?

One of the things everyone needs to realize is that all Americans are armed to the teeth on all sides right now and it wouldn't take much to set one group or all groups off with really bloody results in sections of this country right now.

Look how crazy "peaceful" demonstrations got in one day in Charlottesville, Virginia when three people died.