If Obsidian wants to explore aftermath of PoE2 in Avowed, I think this is a perfect place to bring new players in. This is where secrets can be revealed to the whole world, and Avowed protagonist could face the truth by following consequences, rather then learning about Watcher’s journey - in the end while PoE2 set up many things, many storylines did come to a close. Leaden Key’s secret is not to be secret, Eothas completed his journey. Events that led up to
aren’t as relevant as the event itself. It could be a good place to invite new players and hopefully they might be interested enough to try older titles.
But yeah, I assume it is not called PoE3 for a reason - as far as we know it might have nothing to do with PoE storyline. Whatever it will be, I am not worried about it. Obsidian has never compromised on RPGness of their RPGs. Even their most streamlined RPGs (like Outer Worlds, Tyranny) are still really good.