The Pathfinder games have amazing character customization, noting that I don't mean this in a superficial physical appearances way. I mean customization with respect to races, abilities, classes, and multiclassing. And they also offer the greatest range of options for customizing the game itself, specifically gameplay. And for me, nobody beats Obsidian when it comes to branching dialogue. And their games also offer excellent character customization. As for reactivity, Larian's reactivity is pretty much a thing only if you opt to play their origin characters. But a custom PC with less reactivity is far superior to an origin character with more reactivity. So when comparing reactivity in a Larian game to that in other games, I only consider the reactivity of custom PCs in Larian games. Origin character reactivity is irrelevant to me.
Don't get me wrong, I adore Obsydian games, but the dialog branching has always fallen a hair short for me. It seems like it's so good that when it misses, it t really misses. Compare to something like Mount and Blade where there's no expectation the dialog will be any good, so when it's bad, it's no big deal. But in either PoE, the moment that what seems like an obvious option is missing, it's really disappointing.
I suspect BG3 will be much like that, and I hope that they really improved dialog from EA, because what we have is good, but it often feels shallow.
Okay, so we actually have something in agreement here. You agree with me that BG3's dialogue writing is not the awesome perfection many here are trying to make it out to be. And what you say about an obvious dialogue option being missing in some PoE dialogue is exactly something I would say about BG3 dialogue, except that the missing dialogue options are not random or arbitrary but rather typically very specifically the true-good dialogue options (as opposed to stupid-good dialogue options). And that, as someone who is interested only in playing a very strict good hero play-through, is super-frustrating to me.