I admit, I really preferred how Owlcat's Pathfinder games handled this, where skill checks are automatically taken by the party member with the highest relevant skill. Say, if a Persuasion check appears in dialog, the roll is made by the character with the highest Persuasion skill, without having to swap to that character. If a Strength or Agility check appears, the character with the highest stat makes the roll automatically.

There should at least be an option for this in BG3.