I don't care about the developer value proposition. None of mine were bought that way, so it's not my problem. Also, you didn't ask that in your original post. You asked: "Are timeshare maintenance fees still worth the value vs hotel or other forms of vacation travel?"
As an aside, given that question maybe it's not surprising people gave you hotel comparisons.
Even so, there are a handful of intervals that can justify the retail value on a like-for-like basis, whether renting on the "traditional" market (direct from the "brand", expedia, etc.) or renting from a typical owner. When I say like-for-like, I mean renting that unit with that view during that time at that resort. But, for most people in most situations, I would tell them that buying from the developer is a bad idea.
----
This is not at all what you asked, but I'm also increasingly of the opinion that the real value in timesharing is not "spent the least amount of money on vacation lodging." Instead, it is some balance of "I stayed in a nicer place than I would have rented, for not that much more money than I would have spent otherwise." plus "I have these use-it-or-lose-it assets, so I guess I better figure out how to go on vacation."