Instead of gathering small pieces of food outside the nest, perhaps the ants can drag the entire kill back inside the nest for the workers to process. Or if it's a huge kill like a tiger beetle, they can rip it into 3 pieces and multiple ants can assist with carrying each piece. I understand something like this is easier said than done, as it involves changing the whole food gathering engine and each piece of food would have to be visibly unique (some ants carrying a leg while others carry the head), but it's just an idea to help with the realism. 8)