Dunno. I definitely think PoE has the stronger claim to being the "spiritual successor" of the BG/IE series.
DA:O was close, but I'm sorry ... DA2 pretty much threw out "successor-ness" out the window, and DAI didn't come back to it ... enough ... for me, anyway.
I was curious to see what feedback PoE was getting on these forums, because DAI has largely been a frustration for me ... it's not so much the game itself, but their choice to make it run only on Windows & consoles, which was not true of the first two games.
As I said in another thread, it also looks like Obsidian have built the game to be mod-friendly from the get-go, which ... imho ... is another positive.
You know, I want to reiterate one point. I'm not a "grognard" who wants gaming stuck in 1998. But I am somebody who does want some way of taking some of the things that were right in RPG gaming in that period ... where there is also plenty of room to innovate both technologically and in terms of the underlying gaming system.
It was an interesting and bold choice for PoE to not award XP for the mere act of grinding-killing ... this is an innovation I've wanted to see for a while, and as always not everybody likes it, but it looks interesting. You can get XP for killing, but only if it's for the fulfillment of a quest. Also, they ditched some of the hindrances of D & D mechanics for their own ruleset, and this looks to me to be a positive also.