What engine are they using? You aren't wrong, but at the same time it is what it is. It has never been the best looking game always is the most demanding and the ugliest game the least. In a perfect world that would be the case. So they have a good looking game with not the most efficient engine at this time. They probably would agree since they've already addressed performance in a couple patches. Their chipping away at it. It is what it is, if they said their done with performance, it's the best ever, then I'd raise a brow.
Lord, are you now seeing balanced core usage or still one being taxed 100%. I also saw a post about someone changing affinity, something like turning off 0 and 1, and by doing that it forces the game to use the other cores evenly.
