Shapiro, to the Beltway, was more about what they always expect from Democrats: A ritual sacrifice to 'centrism' and proving they're not too liberal by shoring up the conservative flank and listening to Republican defector pundits who anointed him. To that element and a lot of media he was the ideal Dem candidate - not too progressive, young and masculine, hawkish in the right places. They were shocked to discover Harris didn't listen to them. But most of them are at a loss to complain about Walz so far, especially after yesterday's pretty much perfect rollout. He impressed many media doubters.
I think the GOP was rightly scared of Shapiro and initially relieved, but they're only pretending to be euphoric. They know they're in trouble. Anyone who saw Walz over the last two weeks but particularly yesterday knows that.
I think Shapiro may well have a bright future in the party and be POTUS someday, and that's fine. But the media is not used to liberals making liberal choices without asking permission from the punditry.