The main problem with the original acausality, and the reason I did a CRT for it, was that it is absolutely inane and ridiculous that someone surviving their past self being killed, or even just maintaining memories of a previous timeline, somehow gives a person immunity to causality manipulation, time manipulation, and makes them only killable via high level reality warping, which is what the acausality page was saying.
That is stupid. There is no way in hell that staying around after your past self dies somehow means that you can resist causality manipulation nulling your powers or straight up erasing you.
All I did was take the definition of acausality as we had it at the time to its logical conclusion that everyone else seemed all to willing to ignore, despite that being exactly what was being written in the acausality definition page.
Seriously, it is not hard. If you are acausal, it means you are free from cause and effect, which means nothing working by your system of cause and effect can affect you. So you can only be harmed by a higher level system of cause and effect, e.g. cause and effect working on higher dimensional time. It is a broken power, and far too many characters had it added merely for the feat of living after their past self died.
From what I see here, people are far too interested in simplicity, and not nearly interested enough in accuracy.