constructive journalism

She's right. Until we start investigating why some things are working, we're not going to be able to fix the things that aren't.
Putting voters first, sticking with the evidence, investigating solutions - all these may help better inform the public about whether to head for the Brexit door or stay put inside the EU. Whether that information will actually change anyone's mind is quite another matter.
Evidence shows that the public are turned off by negative news as it leaves them feeling anxious, passive and helpless, in despair rather than informed. According to research projects into negative bias in the news, not only do audiences prefer positive news stories but exposure to a typical news story results in a drop in mood in most people.