I like the mood of your render and the diffused lighting.
The "someone" with the render settings may have been me, as I was recently asked what I used on the "Hillside" render. Although I used AA12 and Detail 1, I wasn't intending to recommend those settings. I tend to play with settings to "see for myself, what will happen" especially if rendering overnight.
I like to first test high settings on very small test crops of some important area, something maybe just a couple inches wide, and see how slow it may be and if the result is good.
Those little crop renders could allow you quickly to determine if high settings are worthwhile.