http://www.gamespot.com/articles/delay-will-help-witcher-3-look-better-across-all-p/1100-6424378/
http://www.gamespot.com/articles/witcher-3-studio-responds-to-crunch-accusations/1100-6422841/
A couple articles to maybe give you perspective. Basically, for whatever conspirator-y reason, numerous developers refuse to visually optimize games for the high-end and they keep on removing graphical features from the final release. The most blatant example was Watch_Dogs in that they had amazing lighting and shaders in the game files but removed an option for them from the final release because it looked too much better than the "supercharged ps4" version. There was a lot of media coverage on it, you can read about it if you want but the main thing was that a game file had "this is PC only, who cares" in it beside a toggle for essentially E3 graphics. Literally an on/off kind of deal that defaulted off for an inexplicable reason.
As for CDPR and this game, in 2013 and 2014 they said that the PC version would be the way to play and some articles had them saying that they were having a lot of trouble getting the game running nicely and they even had an interview stating that there was a big gap between 900p and 1080p. It was very contrasting to the rest of the industry who was trying to say there was no difference at all. As time passed that tune changed however, a dev later said like many others that there was no difference between resolutions and some months after that they, even the CEO, started saying all versions of the game will look the same. "There is only one build of the game" which sparked initial downgrade worries.
From that I surmise they downgraded the game for parity, just like other companies do. I guess so nobody gets mad after realizing all versions don't look good? PC will always look better but right now the gap isn't nearly as big as it could be, looking at all these downgrades we've been seeing lately.
I haven't noticed many bad textures like that but I think we can look forward to texture mods, I'm sure we'll have lots of them. One texture that did stand out to me was the logs when you first meet the orphans in the swamp ,those were scary
. To me textures aren't a big deal though especially in such a massive game.