Trump has shifted opinion on various topics throughout the last year, but he didn't change course on his opinion of the Putin regime and the unprecedented appeasement of Russia's national interest.
This failure puts Russia in a more desperate financial situation; sustaining Crimea is now much more expensive without a land connection and most of the residents of Crimea are complaining about hyperinflation and frequent power cuts.
It is very difficult to give president-elect Trump the benefit of the doubt regarding conflicts of interest. Naturally he will do everything to promote his business, even as president, because the presidency will end after 4 or, at most, 8 years, but the Trump organization will remain his primary business both for him and his family.