Clearly, Vance wanted to bait Walz into an ugly verbal fight, and Walz wanted to pin Vance down on the actual ugliness of his beliefs, but the whole thing ended up being a bit of a wash.
But the part that stuck, as it always does, is the idea that JD Vance is a Normal Politician with Normal Beliefs that Just Happen To Be Different from his opponent because that's how the whole thing was framed. And that is ultimately a small victory for the fascists.