Remove genetic things from lings entirely.

[DJ-Fireball_did_this]

This stuff goes to pretty much any antag people don't immediately nope from, and it feels like it'll just go down a slippery slope. Should vampires not get genes either? Werewolves? Nuke Ops in disguise?

Those are humans, so they'd still get gene fuckery. They're also supposed to be humans with cool powers and weapons, while lings are aiming to be an actual alien.