Maybe this will actually be a close race.
This was always certain to be a close(ish) race. This also remains an R-favored race.
Unlike the battle for 2013-4 Senate Control, which I think probably never was R-favored in real life. (But is still more realistic than a Romney presidency.)
As to this poll... something's odd. So this was leaked by a disaffected Flake staffer or what?
The authors of the poll did not want to be identified because they were not authorized to release the details.
(Note that the article's details make it clear enough the Flake campaign agree that that poll exists.)
