I think the Redweek point system is flawed. My mid-summer Marriott Newport Coast week was given a valuation less than mid-summer Marriott Desert Springs week - who wants to go to the desert in summer? When I asked for an explanation they replied that the economy has turned softer since the Desert Springs property converted to points, and that my lower point value reflects the fact that people are traveling less.
That's flawed thinking. If we were converting to dollars, that would make sense. But in the absence of dollars, points should reflect only the relative value based on property quality, location, amenities, local activities, etc, and the relative value between properties is not dependent on the economy. The relative values stays the same, absent major changes in the two properties.
If I want to do an exchange instead of rent I will likely join Interval International for one year.