Combine the mustard, citrus juices, orange juice concentrate, Worcestershire sauce, garlic, and 1/4 teaspoon kosher salt in a medium bowl. Gradually add 3 tablespoons olive oil while mixing with a whisk or a fork. Stir in the cheese. Set aside.
Brush the shrimp with the remaining 1 teaspoon olive oil and season with 1/4 teaspoon kosher salt and 1/8 teaspoon pepper. Place on grill or under broiler and cook until firm and bright orange, about 2 minutes, turning once. Remove from heat and cut into quarters.
Toss together the shrimp, romaine lettuce, and croutons in a large bowl. Add the mustard mixture and toss to coat evenly. Season with salt and pepper to taste. Divide the mixture evenly among the tortillas and wrap . Enjoy this wrap immediately.