This is indeed major news. While it may seem like it a lot of the time, presidential campaigns are not literally popularity contests. The candidate most voters find personally more likable does not always win elections, according to many scholarly studies on the subject.
Those same studies show that voters usually choose the candidate who looks and sounds the most competent to them on major issues. So, personality and personal delivery are still crucial, but likability is still not as important as at least a perceived position on the issues.
These economic polls show that the American people seem to be coming to terms with the fact that they may not like Trump personally, but they do like his track record on the most crucial issue: the economy. This is literally the “competency over likability” winning formula.