Uno - On the subject of the Super-Nomad in the video... It appears to me, to be a giant fighter more than a battleship or anything. Only rounder, and round all the way. Kinda like this:
<000
It looks like it sends out some sort of probiscus that shoots the Omega-Death beam. Kind of like:
<000--O~~~~~~
Dos - I disagree on your theory that the Nomad brain is inserted through E. If you spliced open a squirrel, gave it a labotomy, and stuck it (the Squirrel Brain) in some Jello, would it (the Jello) spring to life?... ... Not that I've tried, but my guess is no.
I think it is more likely that the Nomads were genetically engineered as a new species. A sort of test-tube baby. In the areas where Nomads are sold (ships), it says, "*something about organic nature* So it seems more likely that it was grown rather than built." ... Something along those lines. I don't think the brains are parasitic to the jelly-goodness... It's more like the jelly-goodness, with the electrical impulsiness of the brain, and thus control, are parasitic to humans... But natural to the Nomads. Just like Human flesh.
If the gel gets into a human, you get a Wild. The brain's enormous power could probably psycically control the human by attaching its flesh to the brain, to transfer electrical impulses from the Nomad brain... Or just revamp Human impulses, but take over all control. How the goo gets liberated from the Nomad, I'm not sure of. So really, the Human, if stuck inside the Nomad (Magootachi), is the symbiote to the Nomad. Only the Nomad has more control over itself than the Human does; because its fleshy-goo flows in through bodily openings... See previous paragraph or first sentence of this one.