Tbh, it would be surprising if he did love Prometheus; Lance Henriksen has worked with James Cameron on more than one occasion so I sense that Prometheus isn't exactly his style of film. Plus, I think it's pretty clear that Prometheus was never meant to be a true Alien film at all, but a movie masquerading as a "spin-off" simply to attract more viewers. For example, if you re-named or re-sketched all the characters, logos, designs, in the movie that connected it to Alien then the film would be completely different, you can't do that with any of the Alien movies, even the AVP movies; if you look at Alien vs. Hunter, people have said multiple times that it's an obvious rip of AVPR. I think the fact that the producers have said Prometheus 2 will have even FEWER connections to Alien further drives in my point.