Even if nothing concrete comes from the Buzzfeed report, at minimum Trump has just been knee capped for at least the next year or so.
Unless the FBI can investigate and release a statement that everything in the Buzzfeed article is categorically false, this will be a murky cloud that will hang over Trump. Liberals will assume the report is true and distance themselves even further from Trump. I would imagine a good chunk of Independents would also join them. Establishment and moderate Republicans will become nervous about carrying water for Trump because at any moment some audio or video could emerge, which could bring everything down.
If the leak was orchestrated by the CIA as revenge against Trump, then it was pure genius. As I said, if the Trump Team wants to get beyond this then they need to get the FBI to investigate and completely debunk it publicly.
Personally I'm not sure what to believe. The Buzzfeed report would explain a lot of Trump's behavior. I read the whole report and wow... But I guess I'm still in denial that we could have possibly elected a President who is compromised by Russian spies. Just a little too unreal for me....