I hate doing things manually
Oh, me too … 
But if I understand the link correctly, that's an automatic selection process for when more than one upstream DNS server has been selected, right? It doesn't seem to give any user feedback as far as statistics are concerned (apart from the representation in Dashboard where most of the queries got forwarded to).
Since I use my own DNS server both for recursion and local domain resolution (e.g. server.lan), I cannot select any regular upstream DNS servers as then I'd lose local resolution. Therefore, the only option would be to have both BIND9 and Unbound running locally and entered as custom upstream servers. Then Pi-hole would select the fastest, I guess, but not show me by how much they differ in response times. This would make proper debugging and experimentation with cache times and the likes essentially impossible.
A nice little statistics time output, on the other hand, would make that beautifully clear.