Besides, it's not our job to give them our options. We don't know what they want to do. The simplest way is to just ask them what they plan on doing so you can appraise it correctly the first time. It's not that difficult. That's what we do with new construction.
It's not about what they want to do, it's about what needs to be done to fulfill assignment results in a credible manner, aka as repaired needed to bring subject up to the what is represented in the appraisal

( in this case, subject as a house with a functional deck )
Whether it is a repair issue ( subject to repair ) or new construction. ( subject to completion ),, the 1004 d inspection is not about what a borrower wants, the 1004 D inspection is to make sure for the client, that the house was repaired, or completed as house was represented in the appraisal..
All that needs to be stated is "Subject to Repair of the loose deck boards, or " Replace rotted deck boards with new boards". Typically, photos are an exhibit.
Your
"authority" is called competence, and is a part of fulfillment of assignment for credible, reliable results . An owner removing a deck did not fulfill the assignment results in a credible manner, because they removed a functional amenity that affects value.