Valid points again, but I would refer you to my response to Prima- I do think that other CAs/MAs are stronger without such a permanent death mechanic, and, if the issue is that Homunculi are too strong, then mutations or Homunculi should be nerfed in other ways. From a balancing perspective, the fact that a Homunculus can be PKed after they are restrained and have already lost a fight does not make them less strong during the fight itself. Again, a Tawkinist can simply create another Homunculus if the Homunculus is destroyed- the power level of the Homunculus is not substantially altered.
To the second point, I understand how it might come across like that. But my intention with this amendment is not to run away from consequences; quite the contrary. I feel that the current lore, in fact, encourages that behavior. If a character knows that certain actions they might take would lead to their permanent death, it causes them to take no actions at all. Far from encouraging consequence-based roleplay that is dramatic and fun, it encourages personas to hide away and do nothing instead.
Edit: As a response to the edit, I do agree that Klones also have a harsh PK clause; but, provided they have some sort of home, and have stored a vat there, they can never die from a one-off encounter. It requires a concerted effort from their enemies, or multiple deaths, to achieve such. The point about Thaniihum is a good one; to be honest, I have never personally interacted with it, so I did not consider its implications. I do think it is rare enough though that the majority of combat encounters do not revolve around it, however, and that other CAs (Ologs) can achieve a rough power level equal to Homuncs non-magically.