I'm surprised by how many variations of leases have been used. I've seen, I believe, 11 agreements so far.
Of those 11, the ones dated before January 1995, do not have a restriction on the increase in annual use fees. Unfortunately, one from September 1994 doesn't have a limit, but yours in January 1995 does.
Then, by 2004, a whole new agreement doesn't have a limit.
Here's where things get even more complicated. There was a dispute at a very similar timeshare at Fairmont Hot Springs. The owners had leases that were almost word-for-word the same as the one lease I saw from 2004, and the company wanted to drastically increase the annual fees. The owners fought the increase, and didn't pay their annual fees while the case worked through the courts. In the end, they lost, had to pay their lawyers and the company's legal fees, had to pay their annual fees plus interest, and were still stuck in the leases.
For anyone with a recent lease, probably anyone after 2004, they should do whatever they can to buy out of the lease. Fighting is very likely to be unsuccessful, for them.
For anyone with an old lease, probably anyone before January 1995, even though the language is quite different than the Fairmont case, they're unlikely to successfully fight it, for the same reasons that the Fairmont owners lost.
That leaves the handful of people between 1995 and about 2002-2004, whose agreements say specifically that the annual fees will not increase by more than twice the annual consumer price index.
For this group, I think the options are to demand that your annual fees do not increase faster than you agreed to, but you still do not have a right to terminate the agreement before its time is up.