We didn't see what the alien did to Lambert there, did we? Just a corpse. I couldn't tell much of what I was looking at or where she was gored in the above video, and I think all we saw in the film was her foot.
Honestly I would just as soon not have seen her here - I think the imagination of what the f**k he did to her while she was screaming like that is more terrifying. Maybe string her up in the shadows - I assumed she was hanging from chains in the film - but that's all.
(Also, while I think the actors mostly do a great job recreating their performances, some of the original readings - specifically, the audio of Lambert and Parker getting killed - should have been left alone. There is very little in the franchise that is as terrifying as Lambert's final gibbering scream. Imagine hearing that in-game.)