The thing with Kidd that interests me is I think high level radiation is damaging to the Seraphim AND Gorosei and God's Knights.
I've said for a while that I believe that Haki is electromagnetic force being manipulated to cause physiological effects.
Therefore I think that Kidd is one of the most important EOS characters, because:
1. The Magentized nature of Grand Line Islands makes me believe that they're bizarre properties regarding navigation using compasses, is because the past user of the Jika fruit intentionally fucked with the electromagnetism of those islands.
2. His radiation from his Electromagnetic powers allows him to defeat these powerful entities that are using high level electromagnetic forces.
Take Sommers:
Man has a steel heart, and Gerd states his body reattaches like it's magnetized.
The solution?
Assign.
If Kidd makes Sommers body engulfed in a negative field, and then puts his heart separately in In another negative field... they would repel each other.
For a while i've assumed Shamrock or Garling attacked Kidd's homeland, Kutsukku Island. But, between the mechanical prosthetic connection, Kidd being named Kidd when Sommers loves torturing families, I'm wondering if Kidd has beef with Shamrock and Sommers, hence the hatred for Shanks.
The Mecha Heart isn't the important thing here either: we've seen Gunko get blown up by Usopp, Sommers is the only one that has this.
The God's Knights put themselves back together and regenerate through electromagnetism: this is the point of Gerd's comment.
Kidd should be able to use his Awakening skill Assign to keep them from putting themselves back together, if they regenerate through electromagnetic force bonding their bodies back together.
Kidd could be the God's Knights biggest threat. Shamrock is about to SHAKE.