I can understand someone who really likes Riviera, and wants to basically stay there every trip buying resale there, and the same with the
Disneyland Tower, I think those tower resale points will certainly hold their value, as there aren't a lot of other choices convenient to California, except Aulani. It seems most Californians prefer DL over WDW, for any number of reasons, including convenience.
That said, I do like having the ability to stay elsewhere, at least in theory. In practice, I like my OKW, and in th e30+ years of being a member,, have only ventured to other
DVC Resortsw twice, once to Kidani, and once to Poly, though I do want to stay at BLT and Aulani sometime, and
assumming the DL tower has better availability than Grand Cali, I would likely want to stay there sometime, having grown up in the area. So many memories of my Mom, and my granparents enjoying the park.