Risk insight: An unrestricted residuals clause lets the other side reuse your concepts as long as they came from memory rather than documents. This is the single most important term to push back on in this NDA.
Safer rewrite: Delete the residuals clause. If retained, narrow it so it does not permit the intentional memorization of Confidential Information and expressly excludes trade secrets and any use that would compete with the Disclosing Party.
Law ref: Restatement (Third) of Unfair Competition §39
Worst case: The counterparty's team reviews your product roadmap, then builds a competing feature, asserting the residuals clause permits reuse of remembered ideas.