Ok…
The first player.log managed to log a little more about the crash but its still a Direct3D error CreateDirect3D11SurfaceFromDXGISurface. Which is the same end result…
Temperature wise - preface: I personally always want my systems running cooler than recommneded - for application / system stability, noise and longevity of components. I overspec my hardware needs and under spec application/game settings to this end. My comments below are obviously dictated by my personal requirements.
1070 max is 94 degrees C. 70 sounds like the cooling is working so it should be ok. Personally I like to keep my GPU less than 70. I dont recommend overclocking. The issue specific to unoptimised games like LE is that even if the cooling is working you do not want the GPU to be maxed out permanently - this WILL cause instability. By example, stress tests like Furmark have warnings specifically about this so if this is happening in a game its not good and the game needs to be restricted in some way.
Your CPU is notorious for being difficult to cool but it doesnt look like you are running overclocks … the tjunction of the chip is 100 max so its within spec but personally I wouldnt want it running at 80+.
Case fan issues could be a problem - remember that other than the CPU & GPU needing cool air, other components also need to be kept cool so if the interior of your case isnt getting enough airflow, other things could be sweating - even a single overheating mosfet chip (handles power delivery on the motherboard) could cause problems…
Power outage could also have messed with your PSU… they are usually robust but if something managed to mess a fan up, it could have affected other things… and a GPU maxed out will take 150W or more (overclock) could be putting strain on your PSU… Your CPU is also 5ghz turbo so its going to be hungry for power too (it takes 95w at base clocks).
Player.log after driver install is the exact same error as before so no help there…
Some more things to test:
LE shouldnt be maxed out doing nothing in town (no skills procing, inventory/stash not open etc). If you have the framerate limit enabled (check checkbox) and at 60fps then it shouldnt be maxed at 100% unless you have the quality too high at your 1440p. Changing the framerate limit should have a very noticeable affect on the GPU usage - you should see the difference immediately - if not, then there is something else wrong.
Double check that your driver is not overriding the in-game setttings in any way… maybe vsync is enforced at the driver level and defaulting to your 144hz monitor…
Please test for stability at the lowest settings I mentioned above - this will help confirm the performance related instability problem (and confirm that your GPU is idling in game at a decent usage %). 1080p, 60fps, very low quality with all special features disabled… The game should be rock solid stable at this config… if its not, then the problem is more involved…
If you would humor me, please do one last Steam Game File verification - just to make sure the install is still ok - sometimes crashes can mess up the game files.