That's the thing about Ridley he seems to ignore what is the fans like and don't like and he just does his own thing. I would think he would be the last person on earth to look at Alien Isolation. Don't think he's seen most of the other Alien films and dont think his watched the AvP films?
But Blomkamp definitely had inspiration from Alien Isolation. He posted a picture on Twitter when his Aliens sequel was doing the rounds. It was a bunch of pictures on his office wall, and one shot was of the Alien from Isolation doing the corkscrew drop from the vents if I remember correctly?