To be honest I think it's great news. I would much rather trust Cloudflare to handle my (encrypted) DNS than my ISP. I'm based in the U.K and there are very few ISPs that have private DNS - you often hear stories of (U.K) ISPs selling data out the backdoor to comply with things like the Investigatory Powers Act[1].
But besides Mozilla's efforts, I am careful not to browse anything political using a vanilla ISP. Anything sensitive is browsed with Tor for anonymity. I only use a VPN for routing traffic over hostile networks like public wifi hotspots / Starbucks wifi. A VPN is not inherently private but a VPN does have its uses, like for viewing geo-locked content (Like the 'This video is unavailable in your country' scenario).
[1] https://en.wikipedia.org/wiki/Investigatory_Powers_Act_2016
But besides Mozilla's efforts, I am careful not to browse anything political using a vanilla ISP. Anything sensitive is browsed with Tor for anonymity. I only use a VPN for routing traffic over hostile networks like public wifi hotspots / Starbucks wifi. A VPN is not inherently private but a VPN does have its uses, like for viewing geo-locked content (Like the 'This video is unavailable in your country' scenario).
Also for further research if you want to know more about 'trusted' Internet: https://www.youtube.com/watch?v=a4UXnZaunJQ