It is definitely too early to judge. The only thing I see and I do not think that will change in the future is Trump makes quick decisions and is not interested to keep the protocol with other leaders. It is also an unpredictable man or the media have failed till now to understand his temper. But surely, after the end of his presidential term, everyone will remember him.
Trump really has an unusual behavior in international relations. As for his unpredictability that it just seems. Trump goes on the markers which he defined. Any attempt to go beyond the quickly repressed and a Trump is returned in the right direction.