Fresh pasta really makes this dish a standout because it tends to absorb the sauce better and its texture marries well with the lump crabmeat. There is no substitute for lump crabmeat (no shredded claw meat) but you can certainly make this with shrimp. Just don't overcook them.
In a very large saucepan with high sides, heat 1 ½ tablespoons of olive oil over medium heat and quickly add the breadcrumb mixture. Stir until it is well browned and crisp, about 5-6 minutes. Scrape the crumbs into a bowl and set aside. Wipe the skillet clean.