I was about to say that the fog is gone with a sensible FPS drop when I realized that I had not updated the SLI config after installing the new driver, and was running a single GPU.

No SLI fixes confirmed.
Like I said in the Nvidia driver dedicated thread, DA:I is and will remain an AMD title and because of that Nvidia will not rush to optimise their drivers for it. Inter-company politics limit the technical support available to gamers using the competing GPU brand. Sad, but very much true. 
Considering that I have not yet applied patch 3 I figured I would let you know that I noticed the pop in factor only after patch 2, which I waited till the very longest I could before applying. It is most annoying when it is entire camps of enemies that pop. It is not as frequent for me as you are describing it, just noticeably different than before patch 2. It was one of the first things I noticed after the patch.
@Verrenus, thank you for replying on this question also. I was going to ask about it for the same reason but I did not know that it was called "draw distance" and thought it was something to do with "render ahead" just because that sounds like creating something ahead of time before you arrive, like scenery and assets. Thanks for the heads up Funchal99.
Don't mention it! 
Indeed, the distance at which assets get rendered is called "draw distance". This governs things like how far ahead of your character does vegetation spawn, as well as distant rocks, tress and NPCs. Go further beyond that and even major landmasses can appear and disappear from thin air! This is most evident in DA:I in the Hissing Wastes, when you're standing at the top of the mountain looking down across the vast expanse of the desert. Distant objects just... disappear, creating a horribly jarring effect that simply ruins one's immersion. If you've played Skyrim at all, you should be all too familiar with this effect as well. 
"Render ahead", on the other hand, is usually used when referring to the number of frames drawn by the GPU before receiving input from the CPU. Normally, this value is set to "3" by default, at least in Nvidia's drivers, and people have found that reducing this value from "3" to "1" from the Control Panel can help mitigate stuttering and reduce input lag in many games. Some recent titles benefiting greatly from this tweak are Far Cry 4 and Assassin's Creed: Unity (and probably all the rest of Ubisoft's stutterfest PC ports
). Setting the render ahead limit to "1" via the in-game console might also reduce input lag and stuttering in DA:I as well, but I haven't tried this extensively for myself. If you do want to try it for yourself, just type this command into the in-game console, or simply paste it in your "user.cfg" file:
RenderDevice.RenderAheadLimit 1
Hopefully this explanation clarified things a bit! 