Well, I personally don't find Krupa to be "amateurish"--he's playing to the crowd's love of flash, and he's generating a lot of excitement. I like Krupa, I like Webb, they're different players with different approaches and styles.
The passage where it's mainly Goodman and Krupa playing. . . was that a first in a swing jazz performance? Sure it's not Trane and Elvin but it's different for the time.