The Roe decision has been a huge win for the Democrats, they've won every single election it's been on the ballot since. It's still a huge motivator for a lot of voters, so I agree there will be an uptick there. I also think, that as we get closer to the election, polls are going to get tighter and might even show Biden leading.
So far out from an election, especially with two generally disliked candidates, there are a lot of reliable voters on both sides who are polling for third party candidates and as undecideds, as a way to "send a message" to whichever side they always vote. In the end, most of these people end up voting for the party they always vote for, even if they don't like that particular candidate. 1992 with Ross Perot was an outlier, and he didn't even end up getting a single electoral vote anyway. RFK Jr ain't getting shit.
I'm still hesitantly optimistic Biden gets a second term. There's so much time between now and November, Trump is currently in one of his four upcoming trials (with any luck, at least one more will actually go to trial before election day, but who knows). An uncountable number of things could happen by then.
With any luck the fucker will drop dead of a heart attack first.