What are the impacts of DNS-over-HTTPS?

[StephenHoover]

I noticed that Mozilla's Firefox browser started using DNS-over-HTTPS as default when I opened my browser. It immediately linked to the Wikipedia page about DNS-over-HTTPS. Upon some further reading it appears that the solution they introduce may be worse than the problem they are trying to solve. For instance, the first commenter stated 

Quote

Another huge drawback to DoH: IoT devices (TVs, smartphones, etc.) will likely begin coming with hard-coded DoH servers, making it next to impossible to filter their connections and prevent them from phoning home

Does anyone know more about this, and if so, would you be willing to explain like I'm five (ELI5) what it means for someone who uses privacy consciousness tech such as DNS sinkholes?

[Electronics Wizardy]

Basically up until now, all dns requests were unencrypted, so anyone with access to the network pipe could see what computers where making what dns requests, and what results were given. They could also change this so that you can redirect webpages or block some sites. DNS over HTTPS fixes this and makes it so that no one in the middle can read what dns requests your making, or change them. 

 

Id say this is a overall win in security, but some things will abuse them, like stated above. This seems to be inevabable, so it will be the only option in a bit.