I have a bag of those frozen tiny shrimp. I'm making a soup. How should I utilize them? Blend, chop or whole? I'm using nice big fresh shrimp

Exactly right! And it's a broth

Just to understand better... Do you mean you're floating the big, fresh shrimp in the soup? And want to add the tiny frozen shrimp somehow as well? Do you have a recipe for the soup base in mind (cream, broth, etc.)?