The just look like... whatever really, that no thought got put into their designs, they don't even feel authentically Prometheus as I don't get a Carlos Huante vibe. Any aspects of the Hammerpedes or Trilobite influence here feels very superficial and that's the issue. Not that the Pathogen itself's involved. It's brought many good things into the franchise. Like The Cold Forge, Into Charybdis, the rest of Andrew Gaska's tenure with the RPG and the upcoming novels tying into that not to mention the Neomorph.
In simpler terms they ought to feel related to the various Alien forms and they just do not.
It's a really wasted opportunity for something that calls back to the exciting number of unused early concepts.