Sounds good.
Hope the Entware team finally releases the required OpenSSL update...
I tried DNS over TLS in Unbound 1.9.0. Really brief (<10mins). It seems speed-up feature such as session resumption still not available.
On a test domain, DNS over TLS to Cloudflare takes 400ms. Plain DNS takes 60ms. Not worth the penalty to me. OpenSSL 1.1.1a won't magically solve this problem.