And what is the relevance of this quote in discussing sa'angreal? The two are not the same, you know. The text is pretty clear that angreal multiply your strength in the power. Sa'angreal may not. They may allow you to channel X amount, which is vastly greater than what you can unaided or with an angreal.
This has always been a legitimate possibility, with the only thing against it being Siuan's statement that with Vora's sa'angreal, a strong sister could crumple the walls of Tar Valon. Why not any sister?
One possible answer is that all or many sa'angreal can be used only by people above a set strength.

Sanderson's statement may well be right, and we may soon find out if Maria concurs.


Says who? Even if he sa'angreal is a multiplier, there is absolutely no indication that it caes about or responds to forkroot. A sa'angreal may well banish the interference of forkroot, just like it can blast away a shield placed on a channeler if the channeler attempts to draw through it when shielded.


Here I agree. If Rand had used the full power, or even close to the full power of the CK, Asmo might even have come alive. But, we do not know that he did. Rand is not a total nincompoop, even in this stage of the book. I think he used great strength to destroy Natrin's Barrow, but in the end, even less than he could have using Callandor.

I think you should consider that there were alternate theories to your own, and Sanderson may not be wrong at all.