It's June lol. There is no panick/celebrating yet.
One consequence of Trump/Hillary high negatives is the 25% undecided. If it they're undecided that means they didn't 'vote' in the poll; and unless someone has a crystal ball, there's no telling how they will break.
My own take on the undecideds is that they don't really want to vote for Hillary and they're waiting for Trump to show some of the ever elusive and nebulous concept known as 'presidential'.
I still think the election is Trump's for the taking. Hillary's middle name might as well be 'Establishment' and there's an anti-establishment insurrection even on the democrat side; her credibility is in the tank with everyone but her most partisan supporters who wouldn't abandon her if she got indicted and thrown into federal prison.
Trump has a large swath of the electorate he will never get. But, Trump is the challenger and represents change in an election year when people of all persuasions are unhappy with the government.
It's going to come down to who persuades the undecideds and Trump has an excellent shot at them. If, he can stay on message.