I said on the twitter post for this article, that it's probably down to the leaked trailer looking like something from 2010.
Personally the leaked trailer didn't show me a reason to buy it, it looked worse that Crysis 3 and if it doesn't look better than Crysis 3 then it's a no go for me.
I mean it also didn't look anywhere near the level of Horizon Zero Dawn on the PS4, and that game is on the PS4 never mind what it's going to look like when they release it on the pc.