It's presented from a biased point of view. It doesn't discuss the problems with DoH.
The main drawback of DoH itself is it moves DNS to a session based service which causes increases in workload for DNS infrastructure but to be fair the article does mention that so I'm not sure "it doesn't discuss the problems with DoH" is totally fair.
https://wiki.archlinux.org/index.php/Dnscrypt-proxy#Local_DN...
I wonder how they're going to have to work with things like the Australian/NZ censorship which I believe is based on DNS?