Yeah, I think that's all true, although I don't think you can compare campaign driven early voting in 2024 to the exogenous weirdness of 2020. The GOP is really leaning into early voting and mail-in voting this time, which is smart, but those numbers come from somewhere. That said, whether Brown wins or loses, he's going to outperform Harris, both in % and absolute terms. And Moreno will not outperform Trump.
This is true in general, but I'm not sure it's true this time, for two reasons. First, Donald Trump is a uniquely polarizing personality, and I don't think I need to explain that one. There are people who vote for Trump and Democrats everywhere else, and there will be some number of Republicans who don't vote for Trump this time, and vote Harris for President and Moreno for Senate. Second, though - his entire strategy to boost his share is to pull in a disproportional number of low propensity, low information voters. He will get some number ranging from a few to a lot, and most of them will vote Trump and walk out.