No. PoR is a term of art that refers to the attestation whereby both the assets held on deposit and the user liabilities are compared. Under standard PoR, liability holders have the ability to determine that they were included in the liability set (that’s what the Merkle tree is for). The “hard part” is the liabilities – proof of assets on chain is normally trivial. So PoR is not “underpowered” or “incomplete”. A proper PoR really does give you assurances that the exchange is solvent at least in the narrow context of on-platform balances.