Honestly I think, alignment is too restrictive in a PA world. Good, Evil? Nothing more than a perception. In a PA world there is only one alignment, survival.

While yes some are more peaceful, but even the peaceful will do aggressive things to survive. The aggressive know that if they are always aggressive they won't survive. In truth everything is a shade of grey.

Now if they had sliders that wavered between Chaos-lawful and Good-evil would be better than what it sounds like currently. You know something that adjusted by your actions.