We got the Deluxe Plan and are doing Signature Dining every night, and a character breakfast or two. So there are not many ADRs to worry about and not too much time away from the park.
I think it might be hard to get that many people to agree on dinners if you want to eat together, but that is a problem separate from which dining plan to select.
We base our selection of DP on whether we want regular or signature dinners.