KojiSan
Don't worry if people get angry or complain about you not keeping the mc at the center of the universe, they are just to used to the trash that dominates webnovel where literally nothing can happen without the mc and the mc is always an all powerful murder hobo with the same personality as every other mc on this site. They just don't know how to react to something so different to what they're used to so they react with aggression and toxicity.
The truth is that it is extremely rare that someone wants and can make a real book in Webnovel, and if someone complains it is because they are a rat child. You have great writing skills, you might as well write a fantasy book and sell it and hopefully catch on. After all, Harry Potter is a children's book and it was written on the fly, like others that, for example, have many plot holes, for example the original Naruto, in the plot, at the beginning there are things that later They have an explanation of why, but the truth be told, they were things that were invented at the time and that in the future have inconsistencies... Another example is Dragon Ball Z, it was made on the fly and many chapters are filled with talks, and no action, to save time and create a plot, because don't forget that the anime is once a week.
POV chapters are fine if the author can keep a solid upload rate for new chapters. POV chapters are only a little disappointing when someone only uploads one chapter a week (or less) and you've been waiting for new content and instead you get some side story. my stance is that alternate POV is fine, just try not to recap what people would already know from watching the show and try to sparingly retell the same situation from an alternative perspective. If this is an example of what a POV chapter will contain then I don't think there is anything to worry about. As an aside, I always chuckle a bit when authors claim they aren't writing wish fulfilment when it's some fan fiction reincarnation with powers type novel. At least some wish fulfilment is inherent to that style of novel. That's not a bad thing, just as long as it's a minor aspect of the novel and not a dominating feature.
Even when knowing your reasonings, I still disliked Zuko being taught now, when he still is an angsty, angry and spoiled brat. And I disliked how he starts with a No, but he changes opinion with Zuko's phew words while he has another tantrum. It makes his words not have worth in my opinion if he can be swayed that easily. But well, we all know Zuko's true potential. This teachings will be passed to his Royal Descendants, so they are not Uchiha anymore. This is a POV of a greedy person lol.
Ahh cliff-kun strikes again lol awesome chapter but you forgot about the other character type sure you mentioned the greater good one but what about the true villain the enemy in the shadows who is the mastermind behind the hero's suffering the old mans regrets and the unknowning lackey who is the tool for a person or entity so dark and twisted they think and plan everything so they can be entertained. that's right author-san that is you muhahaha. just kidding awesome story so far and yea you really need other pov's to flesh out a story and world.