Faatal, just tested all the SS Reflection thing with 17.4, take a look:
Exact scenarios
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All 1440p vsync off, I7 7700k, GTX 1080 latest drivers, w10. Using new 17.4 presets.
Looking inside a lonely house:
ultra: 41 fps
ultra, ssr off: 108
high: 42
high /ssr off: 118
medium: 147
medium /ssr on: 46
low: 218
low /ssr on: 169
Severe performance drop with SSR On, almost no visual difference. Little FPS difference between reflection quality from low to ultra, but from medium to high I get noticeable stuttering, and you can see the spikes in MSI afterburner overlay graph.
Looking at a water lake:
ultra: 74 fps
ultra /ssr off: 106
high: 79
high /ssr off: 113
medium: 135
medium /ssr on: 91
low: 200
low ssr /on: 113
The fps drop is heavy with SSR On but not like inside buildings. 0 visual difference with SSR, controlled fully with reflection quality option.
Dunno if AMD users get that big drop with SSR off, but it's clear with a modern beefy nvidia card is by far the most demanding setting with almost no visual feedback. I recommend everyone to try reflection quality medium and ssr off, and TFP should set SSR off even in ultra preset by default to avoid complaints from most users.
On the other hand
1. View distance option is not touched by presets, shouldn't be high at least for ultra preset?
2. Tree quality should be renamed to mesh or model quality, look at zombies and play with that option