Hmm.
We seem to already be doing a good enough job convincing Zuko about our mother -- and even if Lo and Li can give us better evidence, it would still be us giving that evidence to Zuko; there's nothing stopping Zuko from dismissing
it as much as anything else we could say on the topic.
Sozin vs. Iroh, though... hm. The latter is a present threat, someone we may
have to defeat eventually... but that may be in straightforward battle. More information about him
could be useful... but asking about Sozin, that could be useful on a higher level. It may or may not be useful in getting out of these loops, but even if it isn't, it may be quite useful in preparing for and successfully navigating what comes after. The Avatar always wins, after all, and perhaps a better understanding of the Fire Lord at the start of the war will help us be the Fire Lord at the end of it.
[X]
Sozin. The visionary. The genius. The conqueror. Every living person in the world must know his name—and for the last hundred years, most of the dead as well. What led him there? What made him decide to burn the world down, a century before you ever thought the same? And at the end… what did he think of it all?
(And aww, Azula's now able to freely admit that Mai and Ty Lee are her friends and she cares about them.
)