I agree it is a really price-dependent question. I've noticed that for our family of 5, some cruises seem to have only a small difference (e.g. $100 per night) between OV and verandah, whereas for other cruises, it's more like $500-1,000 per night extra.
I think Sept. 2021 is far enough out I wouldn't be too worried about quarantining, so wouldn't worry about needing a verandah for that reason. But I do generally like having a verandah--we often wake up much earlier than the ship breakfast/activities begin so it is nice to have a place to sit, read a book, and watch the ocean. And the fresh air can be very welcome sometimes. Still, that value is probably in the neighborhood of something I'd pay $100-200 more per night for, not something I'd pay a massive amount for.