Breakable (+100 XP, 4 GC Action Dice): Massive damage is far more permanent. If you suffer a bleeding, broken limb, or internal rupture critical injury from the Table of Ouch, double the healing time. If you suffer a more severe injury, that injury is permanent.
I’m debating about making this one seasons only. I feel uneasy about a GC throwing down AD and making you permanently crippled, but in a campaign without the awesome resources of the Agency it should be more difficult to repair serious injury than the core rules book indicates so a campaign quality needs to exist in some form. Anyways, now people have a need for cyberware! Speaking of which, here is a new base gadget mechanism (with special enhancements to follow).
It's not that extreme, and at any rate it's not as though you're throwing it into a stone age game. Replacement parts are just a ripper away, after all, and if you just want a squick-fit rather than going digital, you can do the ghouling yourself.