Yes, their ruleset is a bit out there, and it's really not TB-friendly so adding that mode was a strange move.
From what I understood, it was their will to have simplified "modern" rules fit for computer and they didn't feel that tabletop-based rules were necessary. Or has Obsidian actually tried to get a licence from WotC for PoE, is that what you mean?
For my part I would have preferred a D&D PoE (at least for the rules), but it's just the matter of getting used to the other system, sometimes it's refreshing to change a little bit.
As long as the system is sound and balanced… but I don't have any opinion on that, haven't played it enough to tell.
Ah, or maybe you're referring to the D&D lore, not the rules?
Pathfinder is a fork of D&D 3.5, it's very similar, and the lore is pretty good. So for me, the 2 Pathfinder games made by Owlcat Games are more than enough to satisfy this need
And there's Solasta, even though it won't have as much content, it's still a very good first D5E game.