I think there is a third option, which I will call Option 1.5:
Buy direct, hold it long enough to have gotten what I consider good value based on the vacations I have taken, and dispose of it when I am done. Maybe I get a few dollars back then, maybe I don't, but if I do it is found money.
It is true today that if you buy RIV today and sell it tomorrow, it will cost you significantly more than if you buy and sell PVB. Is that true if you buy today but sell 20 or 25 years from now? Maybe. My bet is "You'd still lose more, but the gap has narrowed." But that's just a bet, and I am not a betting man.
Either way, I do not care what my DVC deed is worth in 20 years, and I hope to use it for vacations until at least that point, more or less. If I do, I will have considered it a good value, even if I have to give it away. If I end up having health issues that prevent me from traveling between now and then, I may lose a little more. On the other hand, I won't be spending money on other travel expenses, so it doesn't matter.
For me, timeshares are a consumable toy, not an asset.