I think that the change mentioned in the post is about 'use cloudflare for DNS rather than whatever your local DNS is'. That has advantages and disadvantages -

I think that the change mentioned in the post is about 'use cloudflare for DNS rather than whatever your local DNS is'. That has advantages and disadvantages - most people use a DNS automatically configured by the ISP they are using. That might be an untrustworthy DNS from a local access point, or a logging DNS at your ISP. Do you trust cloudflare or BT/comcast less? Where it gets a bit more worrying is - if you specifically use a DNS from your VPN to prevent DNS leaks? Will this even play nice with 'signin page on free wifi served by DNS redirect'.