Walz stopped with the "weird" stuff (or radically scaled it back) because the Harris campaign was taken over by Biden alumni, who didn't like it, and they pushed Harris/Walz to run a much more centrist, Cheney-hugging, civility campaign. With the results we see before us.
In retrospect, what was the point of picking Tim Walz as the VP nominee? He got picked because he was good on TV associating Trump and Vance with the weird fringes of the online right, and then almost soon as he got the nomination, he stopped doing that. So why pick him?