Yeah I’m not that happy with the pool config section yet. But I won’t go into general RAID level pro/con either. This is about ZFS, not a general storage guide.
I don’t recommend disabling sync, although I personally don’t use it myself. I’m just stating options you got and mentioning drawbacks on either side. But feel free to explain sync more easily. The whole concept is counter-intuitive for most people, which is why there are so many misconceptions about LOG and writes in general.
I keep on editing stuff, adding new paragraphs and optimize some text formatting.