Twitter has new user acquisition/retention problems and this doesn't address that at all (and the only appealing thing about it appeals only to power users).
People invest in Twitter because it's supposed to be a fast-growth tech company. If user growth slows, that narrative is shredded, and so is the stock price.
One thing I've always found odd is that the companies who provide me with a valuable service, like Twitter, refuse to charge me money even though I would definitely pay. I pay for magazine, newspaper, Netflix, Google Play, and Amazon Prime subscriptions. I would more than gladly pay for a Twitter subscription. Instead of trying to appeal to everyone, appeal to people who are willing to fork over some cash for what you have to offer.
With that being said, I don't know why they don't charge for verification. Hell, open up additional verification for businesses and start charging them to use Twitter. There's a surprising number of verified users from all around the world ans as far as I know they're all using Twitter for free, like the rest of us.