Ah, my point is not the description, or that the art doesn't fit that description. I think the description is pretty cool.
My point is that I'd like to see some illustration of them in action, being soldiers, adepts, fusion pilots, rock stars, techies ... sure Swamp Thing is cool too, but I'd assume, that the Runcori has sub-species and such, probably more diverse than humans at least, so I guess you could have the sub-species Runcorthings that are more akin to swamp thing.. and others more humanoid, and others less humanoid and less mobile - think big Neti stuck in the ground sort of thing, big tree, big trunk, or just... one big piece of sentient log.
My point is that I'd like to see these with gear, handling spaceships (dogfights, starfighters, smuggling runs, blockade running), repair tools, weapons, brawling, dealing drugs, haggling over spare parts in a junk yard. That one image of them in the book doesn't really entice and invite players to coolness - and I think coolness (in as many shapes and colours as cosmically possible) is essential for rpgs and fun gaming. And, to be honest, the description is actually kind of cool, but the image is not - no offence to the artist, but I'm not seeing the coolness that I see, for instance in the Gorsiva. I can definitely see a Gorsiva ninja/assassin/insta'death-type-character in the Gorsiva. I can only imagine it in the Runcori depiction, even if the description and nature of the species is pure ninja-death-dealing-assassin-power-of-nature-gone-mad! The illustration, not so much, more like a disgruntled rucola. Add a bandana, minigun and bandoleer, or a tool set, harness with tools, blow torch, fixing a transport. In a spacesuit (whatever that would look like) outside the hull of a spacestation, suspended in low gravity trying to fix a leak, the space station in a decreasing orbit with more runcori fighting off zerglings (or silth-drones if such exists) attacking en mass -> in space! Or slicing/hacking a computer system while the Gorsiva ally is covering him with a big gun - or the other way around a Gorsiva or Ceran or Madji hacking or trying to disable a lock, while the big runcori (think chewbecca size) is standing guard, or even shooting at pursuing Silth troops.
Basically: more illustrations of the species, in action, with stuff, doing stuff, being mean, being kind, heroic, villainous etcetera ad nauseam.