And the law of death being broken they can interact with the living. Maybe the dead are in commune with the AoT. So they let bits and pieces of info be told without totally driving the living insane with the straight and narrow answer they may have seen.
Now with Caer Caveral breaking the law of life, a death person can cross back into life. TC and Hollian are the only known ones to do it. But Holian continued with a normal living life and pass on after a spent period of time.
Now TC is a bit of a issue. He came back to interact with the living but not in a mortal form. He stayed in a quasi spirit form in WGW and now has a quasi physical form in Runes. Maybe the Forrestal knew that he had to be the prime cause in the breaking because he may have known what future effects would occur. A twofold effect, Holian was the mother of Anele and TC ability to block Foul. But TC reappearing thousands of years later might have been to far in the future to anticipate. (Rereading WGW, the part where Caer dies, I felt that he was reluctant to break the Law of Life since he was a creature of Law. But he did because he may have seen the effects that it created. But not the far reaching effect as in Runes)
The part "life and death are too intimately intergrown to be severed from each other" is interesting indeed. The Law of Death was broken during a time where the first staff existed. The Law of Life was broken thousand of years later when Law itself was corrupted. The breaking tended to compliement each other. The Law are intertwined with each other in their breaking.
Now a new Staff of Law is formed from Vain and Findail. I got the impression that this second staff has much more power than the original.
It's almost alive in the purpose it serves in comparison to the original one.
Spoiler
Spoiler
So what Mhoram is true. The two are interwoven and shouldn't be seperated. Maybe I'm reading more into it than was it really is.