In all seriousness, has anyone released a non-biased analysis on exactly how influential this meddling was?
No, and I don't think it would be possible to produce one.
While it's true that Trump won by small margins in the four states that essentially determined the outcome of the election—Florida, Pennsylvania, Michigan, and Wisconsin—how would anyone go about figuring out whether the opinions of the swing voters were influenced by the Russian interference?
Assuming for the sake of argument that the Russian influence campaign did have an effect on those voters, it seems unlikely they knew at the time or would realize now that they had been manipulated. And what survey methodology could persuasively weigh the magnitude of that influence against other factors at play when they were making up their minds: e.g., "change" voters who chose Obama in 2008 and 2012 because of the economic recession and Trump in 2016 because they had been left behind by the economic recovery, individuals without employer-provided medical insurance who were unhappy with the options they were offered in their respective states by the Affordable Care Act, "social conservatives" who were angry about the success of the gay rights movement, etc.
And even if you could somehow determine, again for the sake of argument, that Russian meddling was the decisive reason those voters chose Trump, what difference would it make? Absent some evidence of electoral fraud in those states, their votes—however arrived at—would be just as valid as those of voters whose opinions were not influenced by the Russians.
Florida was always a toss-up. Based on my reading of the pre-election surveys, Trump won in those three northern industrial states because some voters who were predicted either not to vote or to vote for Clinton decided in the last week or two before the election (too late for their changed intentions to be recorded by the polls) that they
were going to vote and that they preferred Trump.
The Special Counsel's investigation into Russian interference and related investigations by several U.S. Attorneys are intended to prosecute those who violated federal criminal statutes, regardless of what effect they may have had on the outcome of the election. The counterintelligence efforts of the FBI and the intelligence agencies are designed to thwart future election interference.
The election is over. The result is not in doubt. Sadly, in my opinion, but, as Director of National Intelligence Dan Coats said the other day in another context, "it is what it is."