It might quell some of the more outlandish discussion about Trump as a Manchurian president, but this doesn't resolve some of the other questions re: collusion.
Trump still could have colluded with the Russians previously before performing this major 180.
And everyone is assuming that Putin actually wanted Trump to win and worked with him because he likes him. It could have just been that Putin thought Trump would be easier to maneuver against than Clinton. And if that is the case, his investment is already paying off.
I don't think that's entirely clear. I recently read an article detailing how the Russians are having serious 'buyer's remorse.' Specifically, Russia has historically been able to 'punch above their weight' through paranoia and unpredictability about Putin's next move. Now, however, most people are more concerned about Trump's unpredictability and instability, which has blunted Russia's own use of unpredictability... but has also meant that the Russians are unable to anticipate Trump's own actions.