We dint book with the dinning offer something I was thinking id regret. in the end we went down the
DVC route via a lovely renter on here. I think overall it will work out cheaper without the dinning credit due to savings on the room.
As based on your example if boardwalk currently 10 nights at boardwalk is over 4k via DVC £2k + depending on point cost.
Rack rate might have been slightly cheaper when this offer was on, But Disney currently have 1 free night with 10 nights.
So good savings to be made via DVC if you willing to risk