Don't blame the deal snaggers...
There are plenty of trades that aren't stellar deals. Actually, there are probably more exchanges that fall into that non-stellar category than there are ones that are the sweet deals described here. And it's rather sad to think that the people who own the best weeks often didn't get a very good value for their money considering that others are able to trade into their intervals for a fraction of their own cost.
There are no denials that these great deals are a result of someone else's loss. Last Calls, for example, obviously, are a result of inventory that no one used for whatever reason... so they are liquidated. AC's work much the same way... they are offered on inventory that is not popular, generally. An AC can also snag a room at a very popular location, if it is not taken by other means over 60 or so days out.
But, the fault that they are available cheap is not with those that snag them up. Rather, it is due to the rightful owners depositing them with the exchange companies, and then no one taking them in a timely manner... therefore they must be liquidated. Keep in mind that the rightful owners paid their full maintenance fees... otherwise they wouldn't have been able to exchange them.
Bottom line... the deal snagger is not costing you money, except, perhaps, by damaging the resale value of the more expensive resort by making potential owners of the more expensive resort wonder why in the world should they buy the more costly resort if they can just exchange into it using a much cheaper resort... I wonder the same thing. I traded a week that I paid full maintenance fees on for a another week way before it was close to being liquidated. It is not my fault that my home resort charges a fraction of the maintence fees that the destination resort charges. Both resorts agreed to trade their weeks and I took them up on it. Why begrudge me for taking the deal that everyone directly involved in the transaction accepted.
On the other hand, two reasons for paying for the more expensive resorts are to insure that you can stay there, rather than risking not being able to trade into it. Secondly, owners usually get first dibs on the prime units... ocean view, for example.
One other thought... keep in mind that over development is not likely to go away... developers will continue developing as long as the consumer keeps on consuming... so take it for granted... expect it.... cause it is virtually guaranteed sooner or later.
About the only way to fix the inequities that I can think of would be to charge the incoming exchangers the difference between what they paid to exchange into it and what owners of the destination resort pay in maintenance fees. Those funds could go towards the general fund. Then the owners of the more expensive resort could pay less in maintenance fees... the costs would be shared equally by those who actually stay rather than by those who own. The problem with that is that the more expensive resort would almost certainly end up with a lot of empty rooms because people like me would say, thanks, but no thanks. That, too, would seriously hurt resale value. In timesharing and outside of timesharing goods and services must be liquidated if the market won't bare the full value.