I sincerely doubt they will explain too much of it. If they need the WoL to be beaten they'll just say 'Azem rock ran outta charge'. Then have it recharge from the chalice-key when necessary. They just brought up Dynamis before when the canon required a power and then dropped it just as quickly.
the thing is, the absence of the explanation is actually a huge plot point through out the story, many characters wonder or are struck with terror and confusion at our strength, from Elf Pope, to many characters, Zenos's entire obsession comes from it, realistically we should never be able to match him, as he's a sort of bizarre mutant exception to all the rules, so too must we be.
Hell the ENTIRE STORY is reliant on it, the Warrior of Light is essentially the infinitely sharp tip of the spear that makes the impossible, possible, the Crystal of Azem is nothing but an incantation that uses the users power, it only briefly held an external power source, during the end of Endwalker, which was spent to bring back the Scions, otherwise its just a fancy way to cast a spell , that YOU still have to cast.
To be clear, we are now stronger than any known Ancient, we are stronger than beings that had decades to plan specifically for us, Zoraal Ja, who had essentially the settings most advanced tech to do so, to no end, even the smartest thus far character, capable of seemingly perfectly analyzing and simulating our abilities with foreknowledge of who and what we are, Calyx, led him nowhere but defeat.
