I would like our companions to provide intel, when our character fail his check roll ...
Like:
Tav failed in history check, Gale rolls his dices, and if sucess, he speaks with "I remember that."
I would support the idea of being able to let companions express themselves instead of our characters ...
Like:
[Tav Persuation +1] Please allow us to pass.
[Wyll Persuation +3] Surelly you can see we arent even worth your time, if you let us pass, we wont bother you anymore.
But to make it default? :-/ Nah.
I like to have control over my game, the more system do automaticly the less i like it.
And to be completely honest? Sometimes its fun to try persuate someone with -1 modifier, since your character have charisma 8.
I still dont understand why cant we change Race for our hirelings.

Lets us play Githyanki as racist as they trully are!