You do not make a MVC purchase just to garner MR points. You purchase timeshare for destination travel. Whatever MR points you are able to garner & add to the deal are simply a bonus. As to the higher financing rates with Marriott . . . it's a choice tossed out there for each potential purchaser to accept or reject ( just like when you go to buy a car ). Individuals make their decisions and they must subsequently live with them. No sleight of hand by Marriott however.
Timeshare is timeshare whether we're in a boom or in a recession. It's always been buyer beware with TS or any other consumer purchase. Likewise MVC is gonna make decisions which look after their interest. I guess it is not a surprise to learn that some folks are defaulting upon their MVC loans. But that's a consequence of the credit crunch as some households are pretty constrained at the moment.
It's just my own opinion, but both Marriott and MVC are pretty transparent in terms of how they treat their customers. The T&C are clear from the get go, and just like Life, they are subject to change.
Best advice is to enjoy your weeks, assuming you purchased them with good goals in mind.
Barry