Geralt's eyelids are much lower in the current game than in those 2014 demos. CDPR was more than frank when they commented on his old look by saying he was a relatively handsome guy compared to his look in TW2 and VGX era of TW3.
No not the eyelids have been altered - what have been altered is called "crow feet wrinkles" under his eyes, here a close-up:
https://www.youtube.com/watch?v=mUvJ-FcyMHs+
In ever trailer Geralt has been made 10 years older hahahahaha