When everything is special, then nothing really is anymore.
Very much this.
And the fact that you need an "anchor" type down to earth character who will put all the outlandish characters in proper context. Like Edér in PoE. You need to establish some kind of scale with ordinary and outlandish as extremes.
Overall, the saturation of "special" PC's is too high in BG3. It becomes a silly competition who's the most fantastical or creatively written. Would be much better to have a mix of outlandish and ordinary heroes in the party. The ordinary heroes could subtly reference or call out the "special" ones to represent how 99% of Faerun actually is. Think of an Edér type characters going like "what do I know, I've never commanded armies of the Nine Hells or made love to the goddess of magic."
Less is more is a concept I wish Larian would grow to understand. You respond emotionally to something you can relate to - ordinary heroes and underdogs. Showering the player with over the top stories doesn't really accomplish anything except making them numb.
Speaking of the "underdogs" in BG3, the tiefling refugees. Many of them are wearing fancy decorated armor and all of them are horned half devils. The "we are no fighters, we are so desperate" narrative doesn't really get any response from me.
