Again, I don't understand WHY people complaining about 5D III can't focus in the dark.
The difference between -3LV and -2LV isn't a big issue, it's a bit of marketing as the one advantage 6d>5d3 and my observation is people gladly take this to rationalize their 6d purchase when in all honesty the 5d3 is the better camera hands down. In a real world side-by-side comparison the 5d3 might even win in lower light because the center 6d point is non-cross for f2.8+ lenses, and dim light tends to make the camera miss more (my observation with my 100L/2.8 & 6d).
Both 5d3 & 6df will fail in complete darkness, and both will be much quicker using af assist ... for what I shoot probably -1LV would be enough, but +0.5LV (like 6d outer points or all of my 60d) is definitely not enough with a f2.8-f4 lens because it starts to fail in reasonably dim light.
i've put on well over the rated 150,000 shutter actuations and it still performs as it should.
It's only rated for 100k shutter :-) but it's good to hear you're encountering no problems, that might mean that the lack of 1/8000s is really marketing and not shutter protection because the part is so cheap. But of course it's a lot of luck, and it also matters if you shoot at fast shutter speeds a lot as this tends to kill it faster afaik.