VA, at least in this context, is an acronym for 'Value Acceptance'. Here's your answer: when VA is offered and used, the GSE's DO provide R&W relief on the VALUE of the property. The lender is still (as they are when VA isn't offered) responsible for the accuracy and completeness of the property data.
Here's an example that might help: Lender uses the SP as the 'estimated value' and inputs that # into AUS. AUS kicks out the option for VA + PDC. Lender reviews the PDC and notices several latent defects in the property, but does nothing to verify whether they are addressed/remedied. The lender wouldn't be responsible for the 'value' that was input (as they have R&W relief for the value component), but would still be responsible for misleading property condition information (i.e. they didn't address property condition issues). That make sense?