Positives of Trump:
Apparent North Korean desire to make peace. Nato countries starting to realize that they can't forever rely on America to disproportionately defend them. Same for Japan. This may lead to the U.S. being able/willing to cut back on defense spending at some time in the future. Trump's rhetoric on trade deals seem like they may end up generating results in the form of cracking down on abuses of the system. Other countries are realizing the U.S. is not as stable as it once seemed and the over reliance on the Pax Americana may come to an end. I think this is a good thing.
By proposing major cuts to non-defense related federal programs there's a possibility that power will shift back toward states. Northern and west coast states largely prop up the southern states and Republican leaning states. There's going to be a shift in outlook on the issue of states rights if Mississippi, for instance, realizes that they may not be able to rely on federal funds to prop it up. In the coming years we'll see more left leaning people start using "states rights" as justification for policies and right leaning people will start shifting toward more federal power. The wealthy states ought to be advocating for decentralization of federal power since too much of their money goes toward the backwards states. I think that is a good thing.
There have been benefits due to his presidency.