as the article says, david might be recreating engineer's experiments, continuing them or "perfecting" them, but being the very creator of the xenomorph species i dont think so, given the deacon in prometheus exists, even if different looking, it already rules out that possibility, and the process, is already shown, an EGG(elizabeth shaw) produces the parasite(trilobite) that impregnates a host(last engineer) and then the creature emerges when ready(deacon and though way bigger and more developed than the usual xenomorphs, iit woulcc be the same case as the runner alien that develops further before bursting out of its host)
question is, WHY, then hwy is he reconstructed, if i were shaw i woudltn even think about letting "it" do the same again(given that he was te one who infected her boyfriend to begin with)