I don't really know how I feel about the Engineers the way Ridley's redone them. I always liked the mysterious flesh entropies growing into their ships using aliens for ambiguous purposes. I sort of like what they did with the fan theories, with the implication that Jesus was an engineer, which opens up a lot of interesting possibilities, what with the idea that the other Engies were coming down to wipe out all of humanity. I'd be really into seeing Revelations as portrayed by H.R. Giger, and I'd pay infinite dollars to see that, but since Engineers seem to have been a tad devastated by something (Probably alien leakage) I guess they're not really powerful enough to pull that kind of thing off on the biblical scale that was promised. At least not with the same amount of monsters and different apocalypses.
At the same time, the looming mystery and gross, lingering presence of the space jockeys made the whole Alien universe a lot more creepy and surreal, which I really liked, and it added to the effect when it was possible that the Xenomorphs were just something that they found and tried to control rather than the evolution of a biological weapon they unleashed hundreds of millenia ago. Then again, the whole Borg thing they had going on was only one part of a few interpretations over the course of the books and comics.
I preferred the interpretation that they were all like the pilot borg growing out of his chair (Except also grown into different machines for different functions) over the boring Aryan giants and the goofy elephant monsters in tracksuits. I would've actually really preferred if the Engineer concept and the benevolent elephant monsters were attributed to another creature entirely and the Space Jockeys remained just Space Jockeys with their own obscure lore, holding a sort of sinister presence over all of them.
Then again, since the Engineers in Prometheus were shown to be deploying the Genetic Chaos Goo Weapon in the beginning, and it's heavily implied they were a on a genocide mission, it's very possible that these particular engineers were bred for war, which is why they are mobile and adaptible and bigger/more muscular than people. But, seeing as they made the original "Pilot" monster into a space suit, I'm not very hopeful that they haven't really just plain ruined the Space Jockeys altogether.