What I'd like to see more than extra voices is to have the player character fully voiced. I realise that this would add a lot of voice acting, especially with around 10 voices to choose from, but although it wasn't quite what I had in mind at the start of the game, the voice I picked ended up helping to define who my character was. Those occasional moments where you get a one-off voice line are great, although most of the barks get very repetitive very quickly ("better not be cursed!" "I wonder if the gods are watching me!"). Frankly it's crazy that it plays a bark by default on every click... I've warned my brother to turn it way down at the start of the game.
I wonder if now you could use AI to even have the characters say the player name out loud. I'd imagine having the actor say a placeholder name in the line, with the right intonation/emotion, and the computer could replace that with whatever name the player gave their character. As long as there's an option to turn it off and/or fix it if the computer can't work out your pronunciation, it would fix those awkward moments when NPCs try to address you without using your name - my favourite is when the Dream Visitor says something like "I'll only speak to the one who's in charge". And it would be essential to fully voice your player character given how often they give their name in dialogue. I'd hope that using it for that specific use-case would keep all the advantages of using good actors, though I can understand some might see it as a slippery slope: first it's for player names, then it's for responding to specific events in the moment, then it's used for talking about the overall player choices, then...