I think the Ds need a huge or very large advantage with early voting to really win a swing states because Rs will come in large #s on election day.
If you look at each of these 3 states they really don't have that.
PA is only releasing mail in data, not in person early voting. It's currently around 25% of the 2016 turnout, so even this huge D lead is pretty meaningless.
In FL, as mail in makes up a smaller percentage of ballots cast, the D lead continues to shrink.
The SC numbers disappeared, so I can't look back at it now.