I'm not sure I can give an answer to this---at least, not if I'm focusing on the "advocate" part of the question. The thing I see most often in these discussions is "I decided to do X when I bought. Obviously, everyone else should do X too." That's not true at all--partly because now isn't then, and partly because others don't care about the same things I do.
What someone has in their account almost certainly depends on their own preferences, plus the state of play at the time of purchase. What resorts were on sale direct? What were the incentives? What resorts were in "the resale wave" of the first group of owners turning over, and thus easily available on the resale market? What does the resale market even look like?
The same person, with the same preferences, might well have made different decisions if they were buying at a different point. The soon-to-be-gone GFV incentives are a good example of this. Some people who would ordinarily never consider a developer purchase looked at the small delta and thought "Well, that changes things."
The same is true in advising someone making a purchase. How deeply does FOMO run for you? How long do you expect to own? What are your expectations about a Disney trip? How much is location going to matter vs. just being there?
For example.
- My FOMO muscle seems to be under-developed.
- I don't need to stay in the newest and awesomest resort.
- The vacation experiences are more alike than they are different in the half-dozen DVC resorts I've stayed in.
- I am not an "if you can't walk to a park it doesn't count" person.
- I am not a multi-trips-per-year person most years, so the AP discount doesn't really do much for me.
- The others are all nice diversions, but I don't care about them.
So,
for me, resale is probably the thing that makes the most sense most of the time.
But
not everyone shares my preferences. For some people, the thought of not being able to stay at Resort To Be Named Later will keep them up at night. For others, just being told they can't do something makes them want it that much more. Some folks see the prospect of no Epcot Area resorts between now and not too many years after they become empty-nesters, and can't imagine why they would do that. And some people just want a home resort that itself is restricted, which changes the value porposition of resale a lot--at least until 2042.