You're not going to like my comments, but I hope that Vistana does not extended restricted StarOptions from 2020. It will just push the availability problems into future years and make it even harder for people to make reservations.
You bought a vacation property and were then unable to use it, due to circumstances beyond your control, beyond Vistana's control, beyond anyone's control. I think that Vistana was very generous to allow cancelled 2020 plans to be used (via restricted options) in 2021, but it created a foreseeable problem, there is simply not enough inventory to allow 2021 usages, plus canceled 2020 usages, and kicking the can forward won't help. But this isn't a problem that Vistana created and it isn't their responsibility to make you whole. A pandemic happened and everybody got hurt in a variety of ways.
One of the risks of buying property is that if something happens and you can't use it, you still have to pay for it.
Why didn't you book your 2021 Nanea trip at 12 months out using your 2021 ownership? That's the only way to be sure of getting in, especially in 2021 where later you'll be competing with everyone trying to use those excess 2020 options that they banked during the pandemic. You might get something by checking back every day, but I think this will be a tough year for those who didn't reserve during the home resort period.
I will personally be upset if Vistana extends these options and makes it hard for me to use my ownerships in future years. The pandemic happened, people couldn't travel. If you can't use the restricted options, count your blessings that you're still alive and able to be upset about it, there are plenty who are not.